'I think what one has to remember when people "hurt" one is that in 99 cases of 100 they intended to hurt v. much less, or not at all, and are often quite unconscious of the whole thing. I've learned this from the cases in which I was the "hurter". When I have been really wicked & angry, and meant to be nasty, the other party never cared or even didn't notice. On the other hand, when I have found out afterwards that I had deeply hurt someone, it has nearly always been unconscious on my part.'
CS Lewis in Walter Hooper (Ed.), The Collected Letters of CS Lewis Vol III, p.775.