I agree with your remark about loving your enemy as far as actions are concerned. But for me the cognitive basis is the trust in an unrestricted causality. 'I cannot hate him, because he must do what he does.' That means for me more Spinoza than the prophets.
Love, thine is the future. Death, I use thee, but I hate thee. Citizens, there shall be in the future neither darkness nor thunderbolts; neither ferocious ignorance nor blood for blood.
I love writing but hate starting. The page is awfully white and it says, "You may have fooled some of the people some of the time but those days are over, giftless. I'm not your agent and I'm not your mommy, I'm a white piece of paper, you wanna dance with me?" and I really, really don't. I'll go peaceable-like.
Beyond all explanations which a good brain can give, why do we choose the worse and not the better, why hate rather than love, why greed and not generosity, why self-centred activity and not open total action? Why be mean when there are soaring mountains and flashing streams? Why jealousy and not love? Why?
The loneliness of the man is slowly being borne in upon me. There is not a man aboard but hates or fears him, nor is there a man whom he does not despise.
My characters are more like men than these real men are, see. They're rough and rude, they got hands and they got bellies. They hate and they lust; break the skin of civilization and you find the ape, roaring and red-handed.
I am damnably sick of Italy, Italian and Italians, outrageously, illogically sick.... I hate to think that Italians ever did anything in the way of art.... What did they do but illustrate a page or so of the New Testament! They themselves think they have a monopoly in the line. I am dead tired of their bello and bellezza.