Science can give us power over nature, but it cannot give us power over human nature.

It taught me, at an early age, that being wrong can be dangerous, but being right, when society regards the majority’s falsehood as truth, could be fatal.

Knowledge is gained by learning; trust by doubt; skill by practice; and love by love.

Two wrongs don't make a right, but they make a good excuse.

The stupid neither forgive nor forget; the naive forgive and forget; the wise forgive but do not forget.

Whenever masses of people, especially educated people, know something - and when what they know is something they greatly fear because they believe it affects virtually everything they do or want to do - then most likely we stand in the presence of a vast falsehood.

It is easier to do one's duty to others than to one's self. If you do your duty to others, you are considered reliable. If you do your duty to yourself, you are considered selfish.