The interpretation timeline
Psalm 100:6 Douay-Rheims

My eyes were upon the faithful of the earth, to sit with me: the man that walked in the perfect way, he served me.

A.D. 373 – 1849 5 witnesses

Patristic

before A.D. 750
373
A.D.
c. A.D. 296–373
“And Jezebel was able to injure the most religious Naboth by her false accusations; but then it was the wicked and apostate Ahab who listened to her. But the most holy David, whose example you ought to follow, as all pray that you may, does not favor such people but was apt to turn away from them and avoid them, as raging dogs. He says, "Whoever secretly slanders his neighbor, him will I destroy." For he kept the commandment that says, "You shall not receive a false report." And false are the reports of these people in your sight. You, like Solomon, have required of the Lord (and you ought to believe yourself to have obtained your desire), that it would seem good to him to remove far from you vain and lying words.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“I beseech you, let us avoid altogether passing sentence on our neighbor. You see, even though you have no share in judicial authority and yet you still pass judgment in your mind, you have rendered yourself guilty of sin for accepting no proof and acting in many cases only on suspicion and mere slander. This, in fact, was the reason blessed David also cried out in the words, "The one who slanders his neighbor in secret I drove out." Do you see the extraordinary degree of virtue? Not only did he not entertain what was said but he also gave short shrift to the person bent on slandering his brother. So if we, too, want to reduce our own faults, we should be on our guard about this most of all, not to condemn our brothers or to encourage those anxious to slander them, but rather to rebuff them as the inspired author recommended and utterly repel them. In fact, I am inclined to think this is what the inspired author Moses also was indicating in his words, "Do not accept an idle report."”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“And whence wast thou fed? And what pleased thee, when he did not eat with thee? "Mine eyes," he saith, "were upon such as are faithful in the land, that they might sit with me" (ver. 6). That is, that with Me they might be seated. In what sense are they "to sit"? "Ye shall sit on twelve thrones, judging the twelve tribes of Israel." The faithful of the earth judge, for to them it is said, "Know ye not, that we shall judge angels?" "Whoso walketh in a spotless way, he ministered unto me." To "Me," he saith, not to himself. For many minister the Gospel, but unto themselves; because they seek their own things, not the things of Jesus Christ. ...”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Mine eyes shall be upon the faithful of the land,.... To look them out, bring them to court, and promote them to places of honour and trust; such an one was David himself, and such there were in the land of Israel, though but few, and of which he complains, Psa 12:1. Christ's eyes are upon faithful persons, on faithful ministers of the word, who preach the Gospel faithfully, administer the ordinances truly, are faithful to the souls of men in watching over them, reproving and exhorting them; his eyes are upon them to keep and preserve them, and to honour and reward them with a crown of life that fadeth not away; and his eyes are also on faithful members of churches, such who truly believe in him, who hold fast the faithful word, and keep close to his worship and ordinances; his eyes are upon them, to show favour to them, to bestow blessings upon them, and to protect and defend them, and preserve them from perishing: that they may dwell with me; or, "sit with me" (p); at his table, or at the council board, or in judgment, and assist him in the affairs of government: so such as are faithful shall dwell with Christ both here and hereafter; they dwell in him and with him by faith, and have communion with him; they dwell in his house below, and shall dwell with him above for evermore: he that walketh in a perfect way; in God's way, in the way he has prescribed and directed, to what is perfect; in a way agreeable to his word, in all his commandments and ordinances, in Christ, the way, the truth, and the life: and in the way of perfect men (q), as it may be rendered; in the way that such walk; and though he does not walk perfectly, or without sin, yet sincerely and uprightly: he shall serve me; be taken into my service, be employed by me, as a prime minister, a counsellor, a secretary of state, or in other lesser places under David. But, as it refers to Christ, it signifies that such an one shall be a servant of his, which is no small honour; for, where he is, there shall his servant be, Joh 12:26. The Targum is, "he shall stand with my servants;'' in his house here, and at his right hand hereafter. (p) "ad sedendum", Montanus; "ut sedeant", V. L. Gejerus. (q) "in via integra vel integri", Michaelis.”
Source
1849
A.D.
1774–1849
“Faithful. A prince cannot do every thing himself. But he ought to make choice of the most virtuous and skilful ministers. (Calmet)”
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.