Moderation in temper is always a virtue; but moderation in principle is always a vice.

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

I don't know, I don't care, and it doesn't make any difference.

What lies behind us and what lies ahead of us are tiny matters compared to what lives within us.

There are things known and there are things unknown, and in between are the doors of perception.

One new feature or fresh take can change everything.

Promises are like crying babies in a theater, they should be carried out at once.

The greatest power we have is the power of choice.

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

What's done can't be undone.

The only way to get the best of an argument is to avoid it.

Destiny is not a passive agent that lies in the lap of the Gods, but is an active instrument that lies in your own hands to shape as you will.

One of the truest tests of integrity is its blunt refusal to be compromised.

Good advice is always certain to be ignored, but that's no reason not to give it.

Honesty is the first chapter in the book of wisdom.

Desire, ignorance, and inequality—this is the trinity of bondage.

The trouble with most of us is that we would rather be ruined by praise than saved by criticism.

Be silent or let thy words be worth more than silence.

I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.

Be frank and explicit. That is the right line to take when you wish to conceal your own mind and to confuse the minds of others.

We may encounter many defeats but we must not be defeated.