A cynic is not merely one who reads bitter lessons from the past, his is also one who is permanently disappointed in the future.

Maturity begins when we're content to feel we're right about something without feeling the necessity to prove someone else wrong.

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

Enemies, as well as lovers, come to resemble each other over a period of time.

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.

People who think they're generous to a fault usually think that's their only fault.

Skepticism is not an end in itself; it is a tool for the discovery of truths.