Plan all you want, it is a very different thing to actually kill a person than to fantasize about it. In your fantasy, you have superhuman strength. Or your action takes no strength at all. You just do it, your arms gliding effortlessly through the weightlessness of your dream world. In reality, you have to plunge a knife or pull a trigger. You have to look into the eyes of an actual person. You see their humanity. You have to push past the respect for life that has been drilled into you since before you could talk. I’m not saying it’s impossible. It happens every day. But for normal people who have lived their whole lives as law-abiding citizens, trying to be polite and well-mannered, respectful of their elders and kind to animals, good listeners and good employees; for people who use their turn signals, and hurry to get to work on. time, leave tips for their letter carrier, and put dollars in the Salvation Army’s red bucket, hoping to make the world a little better— killing another human being is not an easy thing.