“O unhappy Unbelievers, this Mystery of Love compels me in Love, to call upon you, to beseech and entreat you, to look upon the Christian Redemption in this amiable Light. All the Ideas that your own Minds can form of Love and Goodness, must sink into nothing, as soon as compared with God's Love and Goodness in the Redemption of Mankind.”

1950s, Loving Your Enemies (November 1957)
Context: Now there is a final reason I think that Jesus says, "Love your enemies." It is this: that love has within it a redemptive power. And there is a power there that eventually transforms individuals. That’s why Jesus says, "Love your enemies." Because if you hate your enemies, you have no way to redeem and to transform your enemies. But if you love your enemies, you will discover that at the very root of love is the power of redemption. You just keep loving people and keep loving them, even though they’re mistreating you. Here’s the person who is a neighbor, and this person is doing something wrong to you and all of that. Just keep being friendly to that person. Keep loving them. Don’t do anything to embarrass them. Just keep loving them, and they can’t stand it too long. Oh, they react in many ways in the beginning. They react with bitterness because they’re mad because you love them like that. They react with guilt feelings, and sometimes they’ll hate you a little more at that transition period, but just keep loving them. And by the power of your love they will break down under the load. That’s love, you see. It is redemptive, and this is why Jesus says love. There’s something about love that builds up and is creative. There is something about hate that tears down and is destructive. So love your enemies.

Source: Into the Wild

1950s, Loving Your Enemies (November 1957)
Context: The Greek language comes out with another word for love. It is the word agape. …agape is something of the understanding, creative, redemptive goodwill for all men. It is a love that seeks nothing in return. It is an overflowing love; it’s what theologians would call the love of God working in the lives of men. And when you rise to love on this level, you begin to love men, not because they are likeable, but because God loves them. You look at every man, and you love him because you know God loves him. And he might be the worst person you’ve ever seen. And this is what Jesus means, I think, in this very passage when he says, "Love your enemy." And it’s significant that he does not say, "Like your enemy." Like is a sentimental something, an affectionate something. There are a lot of people that I find it difficult to like. I don’t like what they do to me. I don’t like what they say about me and other people. I don’t like their attitudes. I don’t like some of the things they’re doing. I don’t like them. But Jesus says love them. And love is greater than like. Love is understanding, redemptive goodwill for all men, so that you love everybody, because God loves them. You refuse to do anything that will defeat an individual, because you have agape in your soul. And here you come to the point that you love the individual who does the evil deed, while hating the deed that the person does. This is what Jesus means when he says, "Love your enemy." This is the way to do it. When the opportunity presents itself when you can defeat your enemy, you must not do it.

"Politics and Spirituality conference, Washington D.C. 2006"

Source: The Phantom of the Opera

Source: Shine

1950s, Loving Your Enemies (November 1957)

Source: Drenai series, Waylander II: In the Realm of the Wolf, Ch. 6

Book VI, chapter 3: "Conversations and Exhortations of Father Zossima; Of Prayer, of Love, and of Contact with other Worlds" (translated by Constance Garnett)
The Brothers Karamazov (1879–1880)
Context: Brothers, have no fear of men's sin. Love a man even in his sin, for that is the semblance of Divine Love and is the highest love on earth. Love all God's creation, the whole of it and every grain of sand in it. Love every leaf, every ray of God's light. Love the animals, love the plants, love everything. If you love everything, you will perceive the divine mystery in things. Once you have perceived it, you will begin to comprehend it better every day, and you will come at last to love the world with an all-embracing love. Love the animals: God has given them the rudiments of thought and untroubled joy. So do not trouble it, do not harass them, do not deprive them of their joy, do not go against God's intent. Man, do not exhale yourself above the animals: they are without sin, while you in your majesty defile the earth by your appearance on it, and you leave the traces of your defilement behind you — alas, this is true of almost every one of us! Love children especially, for like the angels they too are sinless, and they live to soften and purify our hearts, and, as it were, to guide us. Woe to him who offends a child.
My young brother asked even the birds to forgive him. It may sound absurd, but it is right none the less, for everything, like the ocean, flows and enters into contact with everything else: touch one place, and you set up a movement at the other end of the world. It may be senseless to beg forgiveness of the birds, but, then, it would be easier for the birds, and for the child, and for every animal if you were yourself more pleasant than you are now. Everything is like an ocean, I tell you. Then you would pray to the birds, too, consumed by a universal love, as though in ecstasy, and ask that they, too, should forgive your sin. Treasure this ecstasy, however absurd people may think it.