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

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.

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.

Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it is not really testable science.

If we are to be truly free, that freedom will come through cooperation and tolerance with one another.

We rarely confide in those who are better than we are.

M: Is he smart I: She yes very smart sees right through me M: In my day we valued blindness rather more

Tomorrow, every Fault is to be amended; but that Tomorrow never comes.

God created people in technicolor. God has never made a difference between black, white, blue, green or pink

Maxwell's Equations have had a greater impact on human history than any ten presidents.

The pride that keeps us from forgiving is the same pride which keeps us from accepting forgiveness.

When I'm on stage, I'm trying to do one thing: bring people joy.

Some people have said Brother Khalid was a villain, but we know he was a victim in a world that is evil. Racism and injustice are the real villains here.

I've always been melancholic. At a party, everyone would be looking at the glittering chandeliers and I'd be looking at the waitress's cracked shoes.