From the early Church Fathers to now.
3 Patristic · 1 Orthodox
“My dearest, if God hath so loved us; we also ought to love one another.”
“He sacrificed for our sins. Where did He find the sacrifice? Where did He find the victim which he would offer pure? Other He found none; His own self He offered. "Beloved, if God so loved us we ought also to love one another." "Peter," saith He, "lovest thou me?" And he said, "I love." "Feed my sheep."”
“If any of you perchance wish to keep charity, brethren, above all things do not imagine it to be an abject and sluggish thing; nor that charity is to be preserved by a sort of gentleness, nay not gentleness, but tameness and listlessness. Not so is it preserved. Do not imagine that thou then lovest thy servant when thou dost not beat him, or that thou then lovest thy son when thou givest him not discipline, or that thou then lovest thy neighbor when thou dost not rebuke him: this is not charity, but mere feebleness. Let charity be fervent to correct, to amend: but if there be good manners, let them delight thee; if bad, let them be amended, let them be corrected. Love not in the man his error, but the man: for the man God made, the error the man himself made. Love that which God made, love not that which the man himself made. When thou lovest that, thou takest away this: when thou esteemest that, thou amendest this. But even if thou be severe at any time, let it be because of love, for correction. For this cause was charity betokened by the Dove which descended upon the Lord. That likeness of a dove, the likeness in which came the Holy Ghost, by whom charity should be shed forth into us: wherefore was this? The dove hath no gall: yet with beak and wings she fights for her young; hers is a fierceness without bitterness. And so does also a father; when he chastises his son, for discipline he chastises him. As I said, the kidnapper, in order that he may sell, inveigles the child with bitter endearments; a father, that he may correct, does without gall chastise. Such be ye to all men. See here, brethren, a great lesson, a great rule: each one of you has children, or wishes to have; or if he has altogether determined to have no children after the flesh, at least spiritually he desires to have children:-what father does not correct his son? what son does not his father discipline? And yet he seems to be fierce with him. It is the fierceness of love, the fierceness of charity: a sort of fierceness without gall after the manner of the dove, not of the raven.”
“Beloved, if God so loved us, etc. What then follows:”
“But if, he says, God so loved us, although we are by no means of the same nature as He, then much more ought we to love, to love those akin to us, and, having learned the surpassing quality of love, to show it to others. For just as one who does not choose what is worthy of choosing is blameworthy, so praise belongs to those who love those worthy of love, because they are beloved. And we, having disposed ourselves in this way, possess both: we are loved, because God loves us and has received us to Himself as children; and we are beloved, because we love our neighbors.”
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.