Every solution of a problem raises new unsolved problems.

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 trials test the strength of faith.

To you, whoever you are, when I am gone — remember to be kind tonight to some lonely person. For me.

Making fun of philosophy is really philosophising.

I would not give much for your religion unless it can be seen. Lamps do not talk, but they do shine.

I don't write drafts. I write from the beginning to the end, and when it's finished, it's done

Africans should be talking and ask questions, like why does America and Russia have the right to veto votes? These countries talk about democracy and yet are not democratic themselves.

But how to get faith strengthened? Not by striving after faith, but by resting on the Faithful One.

I'm trained to difficulties; difficulties can't be eliminated from life.

The path of duty lies in what is near, and men seek for it in what is remote; the work of duty lies in what is easy, and men seek for it in what is difficult.

Skilled leaders focus on "we," not "me."