Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful.

It is not the strength, but the duration, of great sentiments that makes great men.

To avoid criticism say nothing, do nothing, be nothing.

Nothing is so strong as gentleness, nothing so gentle as real strength

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

Circumstances do not make a man, they reveal him.

It is easy to be brave at a safe distance.

One new feature or fresh take can change everything.

Men build too many walls and not enough bridges.

Don't raise your voice, improve your argument.

Good means not merely not to do wrong, but rather not to desire to do wrong.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

Tell the truth. Sing with passion. Work with laughter. Love with heart. 'Cause that's all that matters in the end.

If you do not know the laws of right conduct, you cannot form your character.

Doubt is the origin of wisdom

If I speak of myself in different ways, that is because I look at myself in different ways.

When you learn, teach, when you get, give.

A mistake is always forgivable, rarely excusable and always unacceptable.

Wrong life cannot be lived rightly.

There's no sense in being precise when you don't even know what you're talking about.