We do not know. We can only guess.

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.

Sun shines above making diamonds of lightTink-tinkling, tap dancing, and bright.

The conclusion of things is the good. The good is, in other words, the conclusion at which all things arrive. Let's leave doubt for tomorrow, " Komatsu said. "That is the point.

Being in jail is difficult too because it's like being in a graveyard, you can't do much.

Weve got to go [back to the moon]. But we dont want to stay too long. ... The ultimate goal is Mars.

The secret of my success is longevity.

Once I was in a restaurant and I dropped my fork on the floor, and they gave me a new fork. So I pushed my girlfriend out of her chair.

Pure innovation is more gross than error.

As an actor, you don't want to play a one-dimensional character.

Never pursue literature as a trade.