Whenever we propose a solution to a problem, we ought to try as hard as we can to overthrow our solution, rather than defend it.

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.

Marriage cannot be a job as it has become.

There's a world of difference between, "Look at this mess you made!" and "I don't like to see food on the floor!

I will place no value on anything I have or may possess except in relation to the kingdom of Christ.

The secret to happiness is freedom... And the secret to freedom is courage.

It can be difficult to present mental illness in film without resorting to devices that, if not handled well, can seem heavy-handed or cliché.

The industrial revolution took the father out of the home and put the kids in school. And then everyone had their own little scene.

When they tried to draft me, I earned a college degree.

Sometimes I hear people talk about discipline of self and I think, if you don't have passion, I might discipline myself for a week or two but only passion will hold me steady.

A society which permits anything will eventually lose everything.

An astronomer must be cosmopolitan, because ignorant statesmen cannot be expected to value their services