Here's conventional wisdom: Success makes you happy. Happiness permits you to be generous. In fact, it actually works like this: Generosity makes you happy. Happy people are more likely to be successful.
One night I was in the players' parking lot at the Fleet Center in my Celtics warm-ups about a half hour before a game, waiting for one of my dealers to come up from Fall River, because if I didn't get my stuff I was too sick to even go through the pre-game layup line, never mind actually play in the game.