People tend to project their bad qualities onto other people, but not so much their good qualities. Why? One explanation is that they are lazy and find it easier to assume that everyone is like them. Freud’s explanation was that projection is a mechanism of ego defense: we can’t bear the thought of our own faults so we transfer them onto others. I think it comes from the fact that people don’t think about others at all: they think only of themselves. They never really try to understand another person because there is no one else. Or better, those people most prone to projection are the people who think mostly of themselves. This applies to the projection of good qualities as well as bad: since no one but yourself is real there is only your own psychology, good and bad. Everyone is like me because no one is other than me. Projection stems from solipsism.