Chögyam Trungpa:

So fundamentally, no matter how happy we may be, we are still careful and angry. We do not really want to be exposed, we do not really want to encounter this thing, whatever it is. Of course, we could attempt to rationalize this feeling saying, “I didn’t get enough sleep last night so I feel funny today and don’t want to do difficult work—I might goof up.” But such self-justifications are not valid. The concern over goofing up involves being angry as well as hiding. We are angry at the unnameable private parts that we do  not want exposed. “If only I could get rid of this thing, then I would be relieved, I would feel free.” This fundamental pain takes innumerable forms—the pain of losing a friend, the pain of having to attack an enemy, the pain of making money, the pain of wanting credentials, the pain of washing dishes, the pain of duty, the pain of feeling that someone is watching over your shoulder, the pain of thinking that we haven’t been efficient or successful, the pain of relationships of all kinds.