There is only one failure in life possible, and that is not to be true to the best one knows.

Science is properly more scrupulous than dogma. Dogma gives a charter to mistake, but the very breath of science is a contest with mistake, and must keep the conscience alive.

I have a knack of hoping, which is as good as an estate.

The last refuge of intolerance is in not tolerating the intolerant.

It is very hard to say the exact truth, even about your own immediate feelings – much harder than to say something fine about them which is not the exact truth.

May I reach That purest heaven - be to other souls The cup of strength in some great agony; Enkindle generous ardor, feed pure love, Beget the smiles that have no cruelty. Be the sweet presence of a good diffused, And in the diffusion ever more intense! So shall I join the choir invisible Whose music is the gladness of the world.

Pity that consequences are determined not by excuses but by actions!