Historically speaking all - or very nearly all - scientific theories originate from myths.

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.

Who can know from the word goodbye what kind of parting is in store for us.

What does my smile look like now? Vivi wondered. Can you reclaim that free-girl smile, or is it like virginity- once you loose it, that's it?

We should have understood long ago that there is, in this world, religion without God, religion as a center of all idols that possess fallen man, religion that is the justification for these idols.

Making a fool out of yourself and putting it on the Internet is one of the best bonding experiences you could have.

That was part of her, and you used to know it. It's like now you only care about the Alaska you made up.

In truth you owe naught to any man. You owe to all men.

The relevant question is not simply what shall we do tomorrow, but rather what shall we do today in order to get ready for tomorrow.

If I'm his 'twin,' we do not have the same mother.

It is not goodness to be better than the worst.

What’s your cause? Does it move you to tears? What is it that moves you passionately?