The interpretation timeline
Genesis 6:9 Douay-Rheims

These are the generations of Noe: Noe was a just and perfect man in his generations, he walked with God.

A.D. 45 – 1875 10 witnesses 13 excerpts

Patristic

before A.D. 750
45
A.D.
c. 15 B.C.–A.D. 45
“XXV. Reject therefore with all your might all idea of pleasing the keepers of the prison ; but on the contrary, with all your ability and all your earnestness, labour to please hira who is the cause of all things ; and if you are unable to do so, (for the greatness of his dignity is exceeding high), at all events advance, without ever turning back, towards his powers, and present yourself to them as their suppliant, until they admitting the continual assiduity and sincerity of your service, place you in the ranks of those who have pleased them, as they did Noah, of whose descendants Moses has made a most admirable and novel catalogue ; for he says, " These are the generations of Noah : Noah was a just man, being perfect in his generation, and Noah pleased God"; for the descendants of the compound being were naturally compound beings also themselves ; for horses do of necessity beget horses, and lions beget lions, bulls become the parents of bulls, and so too men beget men ; but such things are not the appropriate offspring of a good mind; the progeny of that, are the virtues before mentioned, namely the being a man, the being just, the being perfect, the pleasing God, which last particular, inasmuch as it is the crowning one, and as it were the boundary of perfect happiness, is enumerated last of all. But there is one kind of creation, which is a sort of conducting and travelling from that which does not exist to existence. This is the one which plants, and animals do of necessity use; and there is another kind, which, is a transition and change from a better genus to a worse species, which Moses mentions when he says, "These are the generations of Jacob ; Joseph when he was seventeen years of age, was keeping the sheep with his brethren, being a youth with the sons of Billah, and with the sons of Zilpah, his father's wives. "f For when this reason inclined to meditation and devoted to learning, was driven down from its more divine speculations, human and mortal opinions, then Joseph, the companion of the body, and of all the things which pertain to the body was born, being still but a youth, even though in the lapse of time he may become greyheaded, as being one who never listened to any older discourse or opinions, which the companions of Moses acquired as the most useful possessions for themselves and their disciples. On this account it seems to Genesis vi. 9. t Genesis xxxvii. 2. me that Moses wishing to describe his figure and to give a more accurate idea of his appearance, so as to make it known, introduced him as tending his father's sheep, not in the company of any one of his father's legitimate sons, but with his illegitimate brethren, who, being the sons of concubines, derive their name from the inferior sex, that of the women, and not from the superior sex, that, namely of the man ; for they here are called the sons of Jacob's wives, Billah and Zilpah, and not the sons of their father Israel.”
Source
99
A.D.
Clement of Rome Patristic
d. A.D. 99
“Let us steadfastly contemplate those who have perfectly ministered to his excellent glory... Noah, being found faithful, preached regeneration to the world through his ministry; and the Lord saved by him the animals which, with one accord, entered into the ark.”
“Noah was found faithful by reason of his service; he proclaimed a new birth to the world, and through him the Lord saved the living creatures who entered in harmony into the ark.”
339
A.D.
c. A.D. 260–339
“Again after these a third appeared: Noah who has received testimony as 'a righteous man in his generation.' And the following will be proofs of his righteousness. A great foulness and darkness of indescribable wickedness had overtaken the whole human race, and the giants talked of by every mouth were carrying on with ungodly and impious efforts their wars with God which are still so celebrated: and already the fathers of this their brood, whether they had sprung from some condition mightier than man's nature, or in whatever way endowed, are said to have begun the teaching of curious arts among men, and to have introduced devices of witchcraft and other mischievous sorcery into their life, so that the whole human race had fallen under one sentence of judgement with God.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“The Scriptures have shown us the gravity of human wickedness and the severity of the punishment that had to be inflicted on it. They then point out to us the one who amid such a multitude had been able to keep a sincere virtue. Virtue in fact is admirable even for itself. If someone cultivates virtue among those who refuse it, he makes it much more worthy of admiration. Therefore the Scriptures, as though in admiration of this just man, point out the contrast: that only one man who was living among those who soon would experience the wrath of God, this Noah, "found favor in the eyes of the Lord God." He "found favor," but "in the eyes of God"; not simply "he found favor" but "in the eyes of the Lord God." This is said in order to show us that he had a single purpose, that is, to be praised by that eye that never sleeps or rests. He had no care for human glory or scorn or irreverence.”
Source
“Do you see how the Lord created our nature to enjoy free will? I mean, how did it happen, tell me, that while those people showed enthusiasm for wickedness and rendered themselves liable to punishment, this man opted for virtue, shunned association with them and thus felt no effect of punishment? Is it not crystal clear that each person chose wickedness or virtue of his own volition? You see, if that were not the case and freedom did not have its roots in our nature, those people would not have been punished, nor would others receive reward for their virtue. Since, however, everything has been allowed to remain with our choice owing to grace from on high, punishment duly awaits the sinners, and reward and recompense those who practice virtue.”
Source
“Therefore, in praise of Noah, Scripture not merely called him "blameless" but added "among the men of his day" to make it clear that he was so at that time when the obstacles to virtue were many. Besides, other men were illustrious after him, yet he will have no less praise than they. For he was blameless in his own time.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“Speaking of Noah, our unerring Scriptures tell us that he "was a just and perfect man in his generation," meaning that he was perfect as far as citizens of the city of God can be perfect during the pilgrimage of this present life, not, of course, as perfect as they are to be in that immortal life in which they will be as perfect as the angels of God.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
אלה תולדת נח נח איש צדיק THESE ARE THE PROGENY OF NOAH: NOAH WAS A RIGHTEOUS MAN — Since the text mentions him it sings his praise, in accordance with what is said, (Proverbs 10:7) “The mention of the righteous shall be for a blessing.” Another explanation is: since after stating “These are the progeny of Noah”, it does not at once mention the names of his children but declares that he “was a righteous man”, Scripture thereby teaches you that the real progeny of righteous people are their good deeds (Genesis Rabbah 30:6). בדורותיו IN HIS GENERATIONS — Some of our Rabbis explain it (this word) to his credit: he was righteous even in his generation; it follows that had he lived in a generation of righteous people he would have been even more righteous owing to the force of good example. Others, however, explain it to his discredit: in comparison with his own generation he was accounted righteous, but had he lived in the generation of Abraham he would have been accounted as of no importance (cf. Sanhedrin 108a). את האלהים התהלך נח NOAH WALKED WITH GOD — In the case of Abraham Scripture says, (Genesis 24:40) ‘‘[God] before whom I walked”; Noah needed God’s support to uphold him in righteousness, Abraham drew his moral strength from himself and walked in his righteousness by his own effort (Genesis Rabbah 30:10). התהלך HE WALKED — This word is in the past tense. The following is the usage of this verbal form: in the “heavy” (כבד) conjugation one grammatical form is used both as future (i. e. the imperative, since the imperative calls for on action to be done in the future relative to the time when the command is given) and as past tense e. g., (13:17) קום התהלך “arise walk” is future (i. e. imperative); התהלך נח “Noah walked” (in this passage) is past; (1 Samuel 12:19) התפלל בעד עבדיך “Pray for thy servants” is future (i. e. imperative) and (1 Kings 8:42) ובא והתפלל אל הבית הזה “When he shall come and shall pray toward this house” is past, only that the ו at the beginning of the word changes the tense into the future (it is Vav conversive).”
Source
1270
A.D.
Ramban Jewish
1194–1270
“THESE ARE ‘TOLDOTH’ NOAH. Commentators to mean “progeny” or “generations” since it further states, And Noah begot three sons. have explained the word toldoth to mean “his experiences” [or “his events”] much the same as the sense of: what a day ‘yeiled’ (may bring forth). In this way the word toldoth refers to the entire section [since all the events of the flood are occurrences in the life of Noah]. But this does not appear to me to be correct since the external events in the life of a person, [over which he has no control], are not his toldoth. The correct interpretation is that the word toldoth here retains its literal meaning of “progeny,” just as, These are ‘toldoth’ (the progeny of) the sons of Noah; And these are ‘toldoth’ (the progeny of) Ishmael., 25:12. Thus Scripture is saying, “These are the progeny of Noah: Shem, Ham, and Japheth.” Scripture however repeats, And Noah begot three sons, because [at the end of the first verse] it interrupted by saying, Noah was a righteous man, and whole-hearted, in order to inform us why He commanded him concerning the ark. And even though Scripture has already stated above, And Noah was five hundred years old; and Noah begot Shem, Ham, and Japheth, it returns to mention them a second time in order to relate that Noah was unlike all his ancestors who begot daughters and sons. This is the meaning of the words, three sons; Scripture mentions their number in order to say that these three alone were his progeny, and they were saved by his merit, and by them was the whole earth overspread. HE WAS A RIGHTEOUS MAN AND WHOLE-HEARTED. Scripture mentions that he was guiltless and perfect in his righteousness in order to inform us that he was worthy to be saved from the flood without any punishment whatever since he was whole-hearted in righteousness. For a tzadik (a righteous person) is one who is found guiltless in judgment as opposed to the wicked person, as Scripture says, And they come unto judgment, and the judges judge them, by justifying the righteous, and condemning the wicked; and also, For Thou art just in all that has come upon us, for Thou hast dealt truly; similarly, In righteousness shalt thou judge thy neighbor. But in the case of Abraham, concerning whom it says, that he will command his children to do ‘tz’dakah’ and ‘mishpat,’ Scripture praises him for righteousness which is synonymous with judgment, and for mercy which is synonymous with tz’dakah. alone it means “guiltless in judgment,” but in the case of Abraham where in addition to tzedek (or tz’dakah) Scripture also mentions mishpat, (judgment) mishpat of necessity means “guiltless in judgment,” while tz’dakah in this case means “mercifulness.” And Rabbi Abraham ibn Ezra said, “Righteous in deeds; whole-hearted in his heart.” However, it is written, Thou art whole-hearted in thy ways; [the term “whole-hearted” is thus used in connection with “ways” and not with matters of the heart]. Now after Scripture said that Noah was a righteous man, meaning that he was neither a man of violence nor one who perverted his ways as did the guilty ones of his generation, it further said that he walked with the glorious Name, fearing Him alone. He was not enticed by the astrologers, enchanters and soothsayers, and surely not by idolatry, and he paid no heed to them at all; to G-d alone he did always cleave, and he walked in the way G-d chose or taught him for he was a prophet. This is analogous in meaning to the verse, After the Eternal your G-d shall ye walk, and Him shall ye fear,, 13:5. which is stated in connection with the removal of him who prophesies to encourage the worship of idols and gives a sign or wonder to verify his words, as I will explain. I will again mention this in connection with the verse, Walk before Me, and be thou whole-hearted, if He Who is perfect in knowledge will be with me. Now since Noah was a righteous man and undeserving of punishment, it was fitting that his sons and his household be saved by his merit for if his sons were to perish, it would have been a punishment upon him. Or it may be said that he was a perfectly righteous man, and his sons and household were also righteous since he taught them; this is analogous to that which is written concerning Abraham: For I have known him, to the end that he may command his children and his household. IN HIS GENERATIONS. Some of our Rabbis explained it to his credit, [i.e., he was righteous despite his generation]; it follows all the more had he lived in a generation of righteous people. Others explain it to his discredit. [In comparison with his own generation he was considered righteous, but had he lived in the generation of Abraham he would not have been considered of any consequence.] Thus the language of Rashi. The correct interpretation according to the plain meaning of Scripture appears to be that he alone was a righteous man in those generations, there being no righteous or whole-hearted men except him in those generations. In a similar sense is the verse, For thee I have seen righteous before Me in this generation, meaning that there is no other in the generation worthy of being saved. Scripture says, in his generations —[using the plural form]— because many generations passed since the time men had become corrupted, and there was no righteous man besides him. Let not the word of our Rabbis concerning Methuselah, [which said that he was a righteous man], cause you difficulty for Scripture tells only that there was no righteous man worthy of being saved from the flood in all those generations except Noah.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And Noah begat three sons, Shem, Ham, and Japheth. When he was five hundred years of age, and before the flood came upon the earth; and when it was so wicked as is next described: of these sons of his, and of the order in which they are placed; see Gill on Gen 5:32. . Genesis 6:11 gen 6:11 gen 6:11 gen 6:11The earth also was corrupt before God,.... That is, the inhabitants of the earth were corrupt in their lives and conversations; they were corrupt both in principle and practice, and did abominable things; and those corruptions were, according to Jarchi, uncleanness and idolatry; they were corrupt in the worship of God, worshipping the creature more, or besides the Creator; and they were corrupt in their manners and behaviour to one another, being guilty of fornication and adultery, and other enormous crimes; of some against God, and of others against their neighbours; and these they committed openly and impudently, without any fear of God, or dread of his wrath and displeasure, and in contempt of him, his will and laws: and the earth was filled with violence; with doing injury to the persons and properties of men; with oppression and cruelty, by tyrannical decrees and unrighteous judgments; or with rapines and robberies, as the Targums and Jarchi; and with rapes, as Aben Ezra adds: the account that Lucian (x) gives from tradition agrees with this; that the present race of men is not the first, they totally perished by a flood; and those men were very insolent and addicted to unjust actions; for they neither kept their oaths, nor were hospitable to strangers, nor gave ear to suppliants, for which reason they were destroyed. (x) De Dea Syria.”
Source
1871
A.D.
1871
“Noah . . . just . . . and perfect--not absolutely; for since the fall of Adam no man has been free from sin except Jesus Christ. But as living by faith he was just (Gal 3:2; Heb 11:7) and perfect--that is, sincere in his desire to do God's will.”
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“Gen 6:9-12 contain a description of Noah and his contemporaries; Gen 6:13-22, the announcement of the purpose of God with reference to the flood. Gen 6:9 "Noah, a righteous man, was blameless among his generations:" righteous in his moral relation to God; blameless (τέλειος, integer) in his character and conduct. דּרות, γενεαί, were the generations or families "which passed by Noah, the Nestor of his time." His righteousness and integrity were manifested in his walking with God, in which he resembled Enoch (Gen 5:22). Gen 6:10-12 In Gen 6:10-12, the account of the birth of his three sons, and of the corruption of all flesh, is repeated. This corruption is represented as corrupting the whole earth and filling it with wickedness; and thus the judgment of the flood is for the first time fully accounted for. "The earth was corrupt before God (Elohim points back to the previous Elohim in Gen 6:9)," it became so conspicuous to God, that He could not refrain from punishment. The corruption proceeded from the fact, that "all flesh" - i.e., the whole human race which had resisted the influence of the Spirit of God and become flesh (see Gen 6:3) - "had corrupted its way." The term "flesh" in Gen 6:12 cannot include the animal world, since the expression, "corrupted its way," is applicable to man alone. The fact that in Gen 6:13 and Gen 6:17 this term embraces both men and animals is no proof to the contrary, for the simple reason, that in Gen 6:19 "all flesh" denotes the animal world only, an evident proof that the precise meaning of the word must always be determined from the context. Gen 6:13 "The end of all flesh is come before Me." אל בּוא, when applied to rumours, invariably signifies "to reach the ear" (vid., Gen 18:21; Exo 3:9; Est 9:11); hence לפני בּא in this case cannot mean a me constitutus est (Ges.). קץ, therefore, is not the end in the sense of destruction, but the end (extremity) of depravity or corruption, which leads to destruction. "For the earth has become full of wickedness מפּגיהם," i.e., proceeding from them, "and I destroy them along with the earth." Because all flesh had destroyed its way, it should be destroyed with the earth by God. The lex talionis is obvious here. Gen 6:14-15 Noah was exempted from the extermination. He was to build an ark, in order that he himself, his family, and the animals might be preserved. תּבה, which is only used here and in Exo 2:3, Exo 2:5, where it is applied to the ark in which Moses was placed, is probably an Egyptian word: the lxx render it κίβωτος here, and θίβη in Exodus; the Vulgate arca, from which our word ark is derived. Gopher-wood (ligna bituminata; Jerome) is most likely cypress. The ἁπ. λεγ. gopher is related to כּפר, resin, and κυπάρισσος; it is no proof to the contrary that in later Hebrew the cypress is called berosh, for gopher belongs to the pre-Hebraic times. The ark was to be made cells, i.e., divided into cells, קנּים (lit., nests, niduli, mansiunculae), and pitched (כּפר denom. from כּפר) within and without with copher, or asphalte (lxx ἄσφαλτος, Vulg. bitumen). On the supposition, which is a very probable one, that the ark was built in the form not of a ship, but of a chest, with flat bottom, like a floating house, as it was not meant for sailing, but merely to float upon the water, the dimensions, 300 cubits long, 50 broad, and 30 high, give a superficial area of 15,000 square cubits, and a cubic measurement of 450,000 cubits, probably to the ordinary standard, "after the elbow of a man" (Deu 3:11), i.e., measured from the elbow to the end of the middle finger. Gen 6:16 "Light shalt thou make to the ark, and in a cubit from above shalt thou finish it." As the meaning light for צהר is established by the word צהרים, "double-light" or mid-day, the passage can only signify that a hole or opening for light and air was to be so constructed as to reach within a cubit of the edge of the roof. A window only a cubit square could not possibly be intended; for צהר is not synonymous with חלּון (Gen 8:6), but signifies, generally, a space for light, or by which light could be admitted into the ark, and in which the window, or lattice for opening and shutting, could be fixed; though we can form no distinct idea of what the arrangement was. The door he was to place in the side; and to make "lower, second, and third (sc., cells)," i.e., three distinct stories. (Note: As the height of the ark was thirty cubits, the three stories of cells can hardly have filled the entire space, since a room ten cubits high, or nine cubits if we deduct the thickness of the floors, would have been a prodigality of space beyond what the necessities required. It has been conjectured that above or below these stories there was space provided for the necessary supplies of food and fodder. At the same time, this is pure conjecture, like every other calculation, not only as to the number and size of the cells, but also as to the number of animals to be collected and the fodder they would require. Hence every objection that has been raised to the suitability of the structure, and the possibility of collecting all the animals in the ark and providing them with food, is based upon arbitrary assumptions, and should be treated as a perfectly groundless fancy. As natural science is still in the dark as to the formation of species, and therefore not in a condition to determine the number of pairs from which all existing species are descended, it is ridiculous to talk, as Pfaff and others do, of 2000 species of mammalia, and 6500 species of birds, which Noah would have had to feed every day.) Gen 6:17-21 Noah was to build this ark, because God was about to bring a flood upon the earth, and would save him, with his family, and one pair of every kind of animal. מבּוּל, (the flood), is an archaic word, coined expressly for the waters of Noah (Isa 54:9), and is used nowhere else except Psa 29:10. הארץ על מים is in apposition to mabbul: "I bring the flood, waters upon the earth, to destroy all flesh, wherein is a living breath" (i.e., man and beast). With Noah, God made a covenant. On בּרית see Gen 15:18. As not only the human race, but the animal world also was to be preserved through Noah, he was to take with him into the ark his wife, his sons and their wives, and of every living thing, of all flesh, two of every sort, a male and a female, to keep them alive; also all kinds of food for himself and family, and for the sustenance of the beasts. Gen 6:22 "Thus did Noah, according to all that God commanded him" (with regard to the building of the ark). Cf. Heb 11:7.”
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.