The scientific tradition is distinguished from the pre-scientific tradition by having two layers. Like the latter, it passes on its theories; but it also passes on a critical attitude towards them.

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 is impossible to get anywhere without sinning against reason.

But the tricks I use are ones that will hopefully benefit the team.

Teach us to pray often, that we may pray oftener.

There are temptations which strong exercise best enables us to resist

We go forward looking in the rearview mirror.

Be relentless in your pursuit for expansion.

I'm probably, if I might, if I stray I might write, go into screenplay or do something in film. Something like that but I think I'm pretty much going to stick to what I'm good at.

I learned a lot, investigative methodology - wise, from litigators - watching their process.

Teaching vocabulary lists is inefficient - the time is better spent reading alone.

I am available to all women - all women who can afford me, that is.