At a certain age some people's minds close up; they live on their intellectual fat.

Unlimited power is worse for the average person than unlimited alcohol; and the resulting intoxication is more damaging for others. Very few have not deteriorated when given absolute dominion. It is worse for the governor than for the governed.

One of the secrets of life is to keep our intellectual curiosity acute.

At a certain age some people's minds close up; they live on their intellectual fat.

Honesty is not necessarily the best policy. The best policy would be to acquire a reputation for honesty and then to cheat at the psychological moment.

Every time you acquire a new interest, even more, a new accomplishment, you increase your power of life.

Being educated means to prefer the best not only to the worst but to the second best.