Rev 21:6

“The sensible types of these, then, are the sounds we pronounce. Thus the Lord Himself is called "Alpha and Omega, the beginning and the end," "by whom all things were made, and without whom not even one thing was made." God's resting is not, then, as some conceive, that God ceased from doing. For, being good, if He should ever cease from doing good, then would He cease from being God, which it is sacrilege even to say. The resting is, therefore, the ordering that the order of created things should be preserved inviolate, and that each of the creatures should cease from the ancient disorder.”

“After these there were not wanting a Marcus and a Colarbasus, composing a novel heresy out of the Greek alphabet. For they affirm that without those letters truth cannot be found; nay more, that in those letters the whole plenitude and perfection of truth is comprised; for this was why Christ said, "I am the Alpha and the Omega." In fact, they say that Jesus Christ descended, that is, that the dove came down on Jesus; and, since the dove is styled by the Greek name peristera (peristera), it has in itself this number DCCCI.”

“That Christ is the First-born, and that He is the Wisdom of God, by whom all things were made. In Solomon in the Proverbs: "The Lord established me in the beginning of His ways, into His works: before the world He rounded me. In the beginning, before He made the earth, and before He appointed the abysses, before the fountains of waters gushed forth, before the mountains were settled, before all the hills, the Lord begot me. He made the countries, and the uninhabitable places, and the uninhabitable bounds under heaven. When He prepared the heaven, I was present with Him; and when He set apart His seat. When He made the strong clouds above the winds, and when He placed the strengthened fountains under heaven, when He made the mighty foundations of the earth, I was by His side, ordering them: I was He in whom He delighted: moreover, I daily rejoiced before His face in all time, when He rejoiced in the perfected earth." Also in the same in Ecclesiasticus: "I went forth out of the mouth of the Most High, first-born before every creature: I made the unwearying light to rise in the heavens, and I covered the whole earth with a cloud: I dwelt in the high places, and my throne in the pillar of the cloud: I compassed the circle of heaven, and I penetrated into the depth of the abyss, and I walked on the waves of the sea, and I stood in all the earth; and in every people and in every nation I had the pre-eminence, and by my own strength I have trodden the hearts of all the excellent and the humble: in me is all hope of life and virtue: pass over to me, all ye who desire me." Also in the eighty-eighth Psalm: "And I will establish Him as my first-born, the highest among the kings of the earth. I will keep my mercy for Him for ever, and my faithful covenant for Him; and I will establish his seed for ever and ever. If his children forsake my law, and walk not in my judgments; if they profane my judgments, and do not observe my precepts, I will visit their wickednesses with a rod, and their sins with scourges; but my mercy will I not scatter away from them." Also in the Gospel according to John, the Lord says: "And this is life eternal, that they should know Thee, the only and true God, and Jesus Christ, whom Thou hast sent. I have glorified Thee on the earth: I have finished the work which Thou gavest me to do. And now, do Thou glorify me with Thyself, with the glory which I had with Thee before the world was made." Also Paul to the Colossians: "Who is the image of the invisible God, and the first-born of every creature." Also in the same place: "The first-born from the dead, that He might in all things become the holder of the pre-eminence." In the Apocalypse too: "I am Alpha and Omega, the beginning and the end. I will give unto Him that is thirsting from the fountain of the water of life freely." That He also is both the wisdom and the power of God, Paul proves in his first Epistle to the Corinthians. "Because the Jews require a sign, and the Creeks seek after wisdom: but we preach Christ crucified, to the Jews indeed a stumbling-block, and to the Gentiles foolishness; but to them that are called, both Jews and Greeks, Christ the power of God and the wisdom of God."”

“That Christ is God. In Genesis: "And God said unto Jacob, Arise, and go up to the place of Bethel, and dwell there; and make there an altar to that God who appeared unto thee when thou reddest from the face of thy brother Esau." Also in Isaiah: "Thus saith the Lord, the God of Sabaoth, Egypt is wearied; and the merchandise of the Ethiopians, and the tall men of the Sabeans, shall pass over unto Thee, and shall be Thy servants; and shall walk after Thee bound with chains; and shall worship Thee, and shall pray to Thee, because God is in Thee, and there is no other God beside Thee. For Thou art God, and we knew it not, O God of Israel, our Saviour. They shall all be confounded and fear who oppose Thee, and shall fall into confusion." Likewise in the same: "The voice of one crying in the wilderness, Prepare ye the way of the Lord, make straight the paths of our God. Every channel shall be filled up, and every mountain and bill shall be made low, and all crooked places shall be made straight, and rough places plain; and the glory of the Lord shall be seen, and all flesh shall see the salvation of God, because the Lord hath spoken it." Moreover, in Jeremiah: This is our God, and no other shall be esteemed beside Him, who hath found all the way of knowledge, and hath given it to Jacob His son, and to Israel His beloved. After this He was seen upon earth, and He conversed with men." Also in Zechariah God says: "And they shall cross over through the narrow sea, and they shall smite the waves in the sea, and they shall dry up all the depths of the rivers; and all the haughtiness of the Assyrians shall be confounded, and the sceptre of Egypt shall be taken away. And I will strengthen them in the Lord their God, and in His name shall they glory, saith the Lord." Moreover, in Hosea the Lord saith: "I will not do according to the anger of mine indignation, I will not allow Ephraim to be destroyed: for I am God, and there is not a holy man in thee: and I will not enter into the city; I will go after God." Also in the forty-fourth Psalm: "Thy throne, O God, is for ever and ever: the sceptre of righteousness is the sceptre of Thy kingdom. Thou hast loved righteousness, and hated iniquity: wherefore God, Thy God, hath anointed Thee with the oil of gladness above Thy fellows." So, too, in the forty-fifth Psalm: "Be still, and know that I am God. I will be exalted among the nations, and I will be exalted in the earth." Also in the eighty-first Psalm: "They have not known, neither have they understood: they will walk on in darkness." Also in the sixty-seventh Psalm: "Sing unto God, sing praises unto His name: make a way for Him who goeth up into the west: God is His name." Also in the Gospel according to John: "In the beginning was the Word, and the Word was with God, and God was the Word." Also in the same: "The Lord said to Thomas, Reach hither thy finger, and behold my hands: and be not faithless, but believing. Thomas answered and said unto Him, My Lord and my God. Jesus saith unto him, Because thou hast seen me, thou hast believed: blessed are they who have not seen, and yet have believed." Also Paul to the Romans: "I could wish that I myself were accursed from Christ for my brethren and my kindred according to the flesh: who are Israel-ires: whose are the adoption, and the glory, and the covenant, and the appointment of the law, and the service (of God), and the promises; whose are the fathers, of whom, according to the flesh, Christ came, who is God over all, blessed for evermore." Also in the Apocalypse: "I am Alpha and Omega, the beginning and the end I will give to him that is athirst, of the fountain of living water freely. He that overcometh shall possess these things, and their inheritance; and I will be his God, and he shall be my son." Also in the eighty-first Psalm: "God stood in the congregation of gods, and judging gods in the midst." And again in the same place: "I have said, Ye are gods; and ye are all the children of the Highest: but ye shall die like men." But if they who have been righteous, and have obeyed the divine precepts, may be called gods, how much more is Christ, the Son of God, God! Thus He Himself says in the Gospel according to John: "Is it not written in the law, that I said, Ye are gods? If He called them gods to whom the word of God was given, and the Scripture cannot be relaxed, do ye say to Him whom the Father hath sanctified and sent into the world, that thou blasphemest, because I said, I am the Son of God? But if I do not the works of my Father, believe me not; but if I do, and ye will not believe me, believe the works, and know that the Father is in me, and I in Him." Also in the Gospel according to Matthew: "And ye shall call His name Emmanuel, which is, being interpreted, God with us."”

“That the grace of God ought to be without price. In the Acts of the Apostles: "Thy money be in perdition with thyself, because thou hast thought that the grace of God is possessed by money." Also in the Gospel: "Freely ye have received, freely give." Also in the same place: "Ye have made my Father's house a house of merchandise; and ye have made the house of prayer a den of thieves." Also in Isaiah: "Ye who thirst, go to the water, and as many as have not money: go, and buy, and drink without money." Also in the Apocalypse: "I am Alpha and Omega, the beginning and the end. I will give to him that thirsteth from the fountain of the water of life freely. He who shall overcome shall possess these things, and their inheritance; and I will be his God, and he shall be my son."”

“From this fountain [God] refreshes believers who are now on the way. However, to those who conquer he will provide abundantly [from this fountain] and give them to drink in the fatherland. He causes rain to fall upon both, so that those who are still on the way are not deprived of drink in this desert and so that those who become citizens [of the new Jerusalem] might continually be inebriated from the stream of delights that come from God.”

“To the one who thirsts after righteousness he promises to grant the joy of the life-giving Spirit that he supplied in the Gospels to those who believed in him. It is "without payment" either because "the sufferings of this present time are not worth comparing with the glory that is to be revealed to the saints," or because it is not possessed except by the good works and the goodness of him who gives it.”

“I am Alpha, etc. As he testified at the beginning of the book that he is Alpha and Omega, so it was fitting to repeat it here for the third time, that neither before him is there any God, as Isaiah says, nor after him is there believed to be another (Isaiah 43). And because the discourse is about the end of the world, the one who is called the consummator of the age can be understood as the Creator.”

“I will give to the thirsty, etc. From this fountain, he now sprinkles believers on the way, and to those who overcome, he offers it abundantly to be drawn from in the homeland. Both, however, are given freely. For the grace of God is eternal life in Christ Jesus our Lord. And from his fullness, we have all received, grace upon grace (John 1).”

“QUESTION: To him that thirsteth, I will give of the fountain of the water of life, freely. ANSWER: He now bedews believers on the road with drops of this same fountain which he will let those who overcome drink plentifully from when they have reached their fatherland. He does both freely, and the grace of God is life everlasting in Christ Jesus our Lord. [Rom. 6:23]”

“He says: It has been done! What has been done? These things, that is the things said, and nothing false about them. He put "have been done" instead of "they will happen." He says: I am the Alpha and the Omega; the beginning and the end. Since he again takes up what was said earlier about him, we too, following him step by step, may again take up what we said before. The Alpha and the Omega, the beginning and the end, indicate God's lack of beginning and endlessness; for since nothing in this life among us is without a beginning, he used "beginning" and "end" in place of "without beginning" and "without end." He says: To the thirsty I will give freely from the spring of the water of life. In the Gospels the Lord says: "blessed are those who hunger and thirst for righteousness, for they shall be filled." (Matt. 5:6) To the thirsty I will give freely from the spring of the water of life. And how, he says, freely, when the saints attain the coming life after many labors? Why then does he say to give freely? This signifies that nothing comparable to the goods of that time can ever be brought by a man, even if he labors ever so much; this is what the apostle suggesting said: "For I consider that the sufferings of this present time are not worthy to be compared with the glory about to be revealed to us." (Rom. 8:18)”