As I approve of a youth that has something of the old man in him, so I am no less pleased with an old man that has something of the youth. He that follows this rule may be old in body, but can never be so in mind.

Nothing stands out so conspicuously, or remains so firmly fixed in the memory, as something which you have blundered.

Sweet is the memory of past troubles.

We must conceive of this whole universe as one commonwealth of which both gods and men are members.

Christianity, democracy, science, education, wealth, and the cumulative inheritance of a thousand years, have not preserved us from the vain repetition of history.

Contrary to what you might think, China's economy is relatively less efficient, and more polluting, than those of rich countries.

Public office must not be a means to profit or become rich.

Growing up, we had to work. If you wanted anything at all that was more than basic food and shelter, you had to make your own money.