Good teaching must be slow enough so that it is not confusing, and fast enough so that it is not boring.

Being yourself is not remaining what you were, or being satisfied with what you are. It is the point of departure and far from the goal.

The generality of mankind is lazy. What distinguishes men of genuine achievement from the rest of us is not so much their intellectual powers and aptitudes as their curiosity, their energy, their fullest use of their potentialities. Nobody really knows how smart or talented he is until he finds the incentives to use himself to the fullest. God has given us more than we know what to do with.

When a baseball player makes an error, it goes into the record and is published. How many of us could stand this sort of daily scrutiny?

Ninety per cent of the world's woe comes from people not knowing themselves, their abilities, their frailties, and even their real virtues. Most of us go almost all the way through life as complete strangers to ourselves - so how can we know anyone else?

As long as there are human beings, there will be the idea of brotherhood -- and an almost total inability to practice it.

Honesty consists of the unwillingness to lie to others; maturity, which is equally hard to attain, consists of the unwillingness to lie to oneself.