John Chrysostom : "And they shall not teach" (he says) "every man his neighbor, and every man his brother, saying, Know the Lord: for all shall know Me from the least to the greatest. For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more." Behold also another sign. "From the least even to the greatest of them" (he says) "they shall know Me, and they shall not say, Know the Lord." When hath this been fulfilled save now? For our religion is manifest: but theirs, i.e. the Jews', was not manifest, but had been shut up in a corner. A covenant is then said to be "new," when it is different and shows some advantage over the old. Here he shows that God counts us worthy of greater and of spiritual privileges: for it is said "their sound went out into all the earth and their words unto the ends of the world." (Ps. xix. 5; Rom. x. 18.) That is the meaning of "they shall not say each man to his neighbor, Know the Lord." And again, "the earth shall be filled with the knowledge of the Lord as much water to cover the seas." (Isa. xi. 9.) — Homily on Hebrews 14 Oecumenius : "And they shall not teach, each one his neighbor." Here it speaks of a teaching that is more laborious. For behold, we see that there is no need for more words for those whose minds are healthy, to persuade them to believe in Christ. For all men are taught by God; for Christ has written His laws upon our hearts. "for they shall all know me." For the Jewish knowledge and faith were confined to one corner of the world, Palestine. And few knew it; but the voice of the apostles went out to all the earth. Moreover, since God dwelt on earth in the flesh, and by taking on our nature made it divine, the light of true knowledge of God shone in all souls, and a certain ability was granted to human nature by grace to truly know God. — The Pseudo-Oecumenian Catena on Hebrews Tertullian : Let no one, then, flatter himself on the ground of being assigned to the "recruit-classes" of learners, as if on that account he have a licence even now to sin. As soon as you "know the Lord, you should fear Him; as soon as you have gazed on Him, you should reverence Him. — On Repentance Tertullian : If there dwelt upon earth a faith as great as is the reward of faith which is expected in the heavens, no one of you at all, best beloved sisters, from the time that she had first "known the Lord," and learned (the truth) concerning her own (that is, woman's) condition, would have desired too gladsome (not to say too ostentatious) a style of dress; so as not rather to go about in humble garb, and rather to affect meanness of appearance, walking about as Eve mourning and repentant, in order that by every garb of penitence she might the more fully expiate that which she derives from Eve,-the ignominy, I mean, of the first sin, and the odium (attaching to her as the cause) of human perdition. — On the Apparel of Women Book I