Self Control.

Wealth is not one of the good things. Moderation is.

Moderation invites to frugality and the acquisition of good things: but wealth invites to great expenditure and draws us away from moderation. It is more difficult for a rich man to be moderate, or for a moderate man to be rich.

Act as if life is a dinner party.

At dawn, when you have trouble getting out of bed, tell yourself: "I have to go to work — as a human being. What do I have to complain of, if I’m going to do what I was born for."