Our aim must be to make our successive mistakes as quickly as possible. To speed up evolution.

True ignorance is not the absence of knowledge, but the refusal to acquire it.

The growth of knowledge depends entirely upon disagreement.

In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality.

The question is not how to get good people to rule; THE QUESTION IS: HOW TO STOP THE POWERFUL from doing as much damage as they can to us.

If you can't say it simply and clearly, keep quiet, and keep working on it till you can.

The best thing that can happen to a human being us to find a problem, to fall in love with that problem, and to live trying to solve that problem, unless another problem even more lovable appears.

Ignorance is not a simple lack of knowledge but an active aversion to knowledge, the refusal to know, issuing from cowardice, pride, or laziness of mind.

A theory which is not refutable by any conceivable event is non-scientific. Irrefutability is not a virtue of a theory (as people often think) but a vice.

I may be wrong and you may be right, and by an effort, we may get nearer to the truth

The attempt to make heaven on earth invariably produces hell.

It was amusing to me to see how the detective's overbearing manner had changed suddenly to that of a child asking questions of its teacher.

We may not be able to control what happens to us, but we can always control how we react.

Impermanence is not something to be afraid of. It's the evolution, a never-ending horizon.

She's so fat, she's my two best friends.

We have to name a problem to solve a problem.

The true worth of a race must be measured by the character of its womanhood.

No matter how you look, we all hurt the same, cry the same, and feel joy the same.

All we have to do to create the future is to change the nature of our conversations, to go from blame to ownership, and from bargaining to commitment, and from problem solving to possibility.

You have to live before you die, or you'll die before you live.