Our feelings. When we try to protect our feelings, we actually become more cruel and callous, not less. People do all sorts of crazy stuff to protect their feelings. Some even fight or go to war over them. Some try to halt scientific progress. Some destroy rationality. Some create an atmosphere of fear. Some trample on free speech. Some kill or maim other people. All over feelings. We are all hugely addicted to our emotion, and not in a good way. As long as you try to protect your own feelings, you don’t and you can’t know true love.