Gambling: The sure way of getting nothing for something.

Isolation is the one sure way to human happiness.

The best way to keep your friends is not to give them away.

The sure way to be cheated is to think one's self more cunning than others.

Progress requires setbacks; the only sure way to avoid failure is not to try.

A sure way to lose happiness, I found, is to want it at the expense of everything else.