Part of properly growing up is knowing the difference between seeming nice and being nice – the latter requiring one to do things to a lover that will for a time enrage and devastate them. For real kindness, we need to have the courage to allow ourselves to be hated. The psychological imperative to appear nice at all costs will guarantee that we’ll be nothing other than quietly, exceptionally cruel. We owe it to those we no longer love to kill all hope and allow them to hate us, confident that we can withstand their anger. In the end, that is true kindness.