From C.S. Lewis’s “Mere Christianity”
4 years ago
General
Once upon a time...
For a long time I used to think this a silly, straw-splitting distinction: how could you hate what a man did and not hate the man? But years later it occurred to me that there was one man to whom I had been doing this all my life—namely myself. However much I might dislike my own cowardice or conceit or greed, I went on loving myself. . . . Just because I loved myself, I was sorry to find that I was the sort of man who did those things.
Consequently, Christianity does not want us to reduce by one atom the hatred we feel for cruelty and treachery. We ought to hate them. Not one word of what we have said about them needs to be unsaid. But it does want us to hate them in the same way in which we hate things in ourselves: being sorry that the man should have done such things, and hoping, if it is anyway possible, that somehow, sometime, somewhere, he can be cured and made human again.
The real test is this. Suppose one reads a story of filthy atrocities in the paper. Then suppose that something turns up suggesting that the story might not be quite true, or not quite so bad as it was made out. Is one’s first feeling, “Thank God, even they aren’t quite so bad as that,” or is it a feeling of disappointment, and even a determination to cling to the first story for the sheer pleasure of thinking your enemies as bad as possible? If it is the second then it is, I am afraid, the first step in a process which, if followed to the end, will make us into devils. You see, one is beginning to wish that black was a little blacker.
If we give that wish its head, later on we shall wish to see grey as black, and then to see white itself as black. Finally, we shall insist on seeing everything—God and our friends and ourselves included—as bad, and not be able to stop doing it: we shall be fixed for ever in a universe of pure hatred.
published in 1952
Consequently, Christianity does not want us to reduce by one atom the hatred we feel for cruelty and treachery. We ought to hate them. Not one word of what we have said about them needs to be unsaid. But it does want us to hate them in the same way in which we hate things in ourselves: being sorry that the man should have done such things, and hoping, if it is anyway possible, that somehow, sometime, somewhere, he can be cured and made human again.
The real test is this. Suppose one reads a story of filthy atrocities in the paper. Then suppose that something turns up suggesting that the story might not be quite true, or not quite so bad as it was made out. Is one’s first feeling, “Thank God, even they aren’t quite so bad as that,” or is it a feeling of disappointment, and even a determination to cling to the first story for the sheer pleasure of thinking your enemies as bad as possible? If it is the second then it is, I am afraid, the first step in a process which, if followed to the end, will make us into devils. You see, one is beginning to wish that black was a little blacker.
If we give that wish its head, later on we shall wish to see grey as black, and then to see white itself as black. Finally, we shall insist on seeing everything—God and our friends and ourselves included—as bad, and not be able to stop doing it: we shall be fixed for ever in a universe of pure hatred.
published in 1952
FA+

Love the neighbor already.
In addition to what you have here, I would add:
"There is more to my life than their cruelty. There is service to my fellow beings. There is my family and my friends. There is knowledge yet to be discovered. There are truths yet to be revealed. Forgiveness grants me access to those things."
Tuvok, from Star Trek Voyager
A few years ago I was working in DC's National Cathedral when Matthew Shepard's remains were interred there. I started visiting the space where he was a lot during my break and thinking about the idea of loving your enemies.
I started getting the idea that if I was able to feel that level of compassion for someone I'd never met in life, it might be possible.
If there's any Hell, it must almost certainly be in that sort of myopic world of hate where everything is wrong and nothing is good. And after death, perhaps, they may suffer more, not from fiery torments but from an awakening of conscience. As with the Wandering Ghosts and Marley, they come to realize that humanity was their business--too late to have the power to help.