To you I'm an atheist; to God, I'm the Loyal Opposition.

Woody Allen

If there's anything more important than my ego around, I want it caught and shot now.
/D.Adams 'The Hitchhiker's Guide to the Galaxy'/

The trouble with her is that she lacks the power of conversation but not the power of speech.
/George Bernard Shaw/

(I'd change 'her' in the second quote into 'some people' )

The shortest and surest way to live with honour in the world, is to be in reality what we would appear to be; and if we observe, we shall find, that all human virtues increase and strengthen themselves by the practice of them.
Socrates

Courage is grace under pressure.
Ernest Hemingway

If you want to make peace, you don't talk to your friends.
You talk to your enemies.

Moshe Dayan

The man who views the world at 50 the same as he did at 20 has wasted 30 years of his life.

Muhammad Ali

At least two thirds of our miseries spring from human stupidity, human malice and those great motivators and justifiers of malice and stupidity, idealism, dogmatism and proselytizing zeal on behalf of religious or political idols.

Aldous Huxley