The pessimist sees only the tunnel; the optimist sees the light at the end of the tunnel; the realist sees the tunnel and the light - and the next tunnel.

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.

"Terrorism" is what we call the violence of the weak, and we condemn it; "war" is what we call the violence of the strong, and we glorify it.

The pessimist sees only the tunnel; the optimist sees the light at the end of the tunnel; the realist sees the tunnel and the light - and the next tunnel.

Happiness is a direction, not a place.

Many married couples separate because they quarrel incessantly, but just as many separate because they were never honest enough or courageous enough to quarrel when they should have.

Man's unique agony as a species consists in his perpetual conflict between the desire to stand out and the need to blend in.