One who is interested in himself is not a selfish person. Selfishness means using other people, other things, other places, to satisfy myself, not in my own interest. It is like a person who, when you put a bottle of wine on the table, because it is free, he drinks all of it and gets drunk. But if he is interested in himself, he will say, “No, thank you, I prefer milk.” So, selfishness is desire-based. Self-interest is development oriented, self-development oriented.