Dogmas of every kind put assertion in the place of reason and give rise to more contention, bitterness, and want of charity than any other influence in human affairs.

He burst into one of his rare fits of laughter as he turned away from the picture. I have not heard him laugh often, and it has always boded ill to somebody.

The less experienced a doctor is, the higher are his notions of professional dignity . . .

There are fifty who can reason synthetically for one who can reason analytically.

You will ruin no more lives as you ruined mine. You will wring no more hearts as you wrung mine. I will free the world of a poisonous thing. Take that, you hound, and that! - and that! - and that! - and that!

There are no fools so troublesome as those who have some wit.

Data!data!data!" he cried impatiently. "I can't make bricks without clay.