The defence of democracy must consist in making anti-democratic experiences too costly for those who try them; much more costly than a democratic compromise

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.

The one who believes himself to be a person needs to try to find that person. This is a solution, an antidote, offered to a ghost that thinks it actually exists.

It will not be we who reach Alpha Centauri, and the other nearby stars. It will be a species very like us - but with more of our strengths and fewer of our weaknesses.

Whenever there is a cross to be carried by any of Christ’s followers, He always bears the heavy end on His own shoulders.

I can't stand making records.

Practically the whole human race is hypnotized because it thinks what somebody else told it to think.

Joy and laughter are the gifts of living in the presence of God and trusting that tomorrow is not worth worrying about.

Imagination is the true magic carpet.

Every woman becomes their mother. That's their tragedy. And no man becomes his. That's his tragedy.

The Democrats' version of immigration is all about securing additional votes.

Remember anything you want that's valuable requires you to break through short-term pain in order to gain long-term pleasure.