The modern millionaire, though he may shower wealth upon elderly artists after they have lost their powers, never imagines that their work is as important as his own. Perhaps these circumstances have something to do with the fact that artists are on the average less happy than men of science.
Source: The Conquest of Happiness, 1930, chap. 10: Is Happiness Still Possible?
More info.:http://russell-j.com/beginner/HA21-020.HTM