The idea that no gentleman ever swears is all wrong. He can swear and still be a gentleman if he does it in a nice and benevolent and affectionate way.

Truth is the most valuable thing we have. Let us economize it.

An honest politician is an oxymoron.

If your only tool is a hammer, everything starts to look like a nail.

Always obey your parents. When they are present. This is the best policy in the long run. Because if you don't, they will make you. Most parents think they know better than you do, and you can generally make more by humoring that superstition than you can by acting on your own better judgment.

Shall we go on conferring our Civilization upon the peoples that sit in darkness, or shall we give those poor things a rest?

Seventy is old enough. After that there is too much risk.