Doing what needs to be done may not make you happy, but it will make you great.

Vivisection is a social evil because if it advances human knowledge, it does so at the expense of human character.

If you strike a child, take care that you strike it in anger, even at the risk of maiming it for life. A blow in cold blood neither can nor should be forgiven.

The seven deadly sins... food, clothing, firing, rent, taxes, respectability and children. Nothing can lift those seven millstones from Man's neck but money; and the spirit cannot soar until the millstones are lifted.

Life is not meant to be easy, my child; but take courage: it can be delightful.

Nothing is ever done in this world until men are prepared to kill one another if it is not done.

You propound a complicated arithmetical problem: say cubing a number containing four digits. Give me a slate and half an hour's time, and I can produce a wrong answer.