There is no such thing as perpetual tranquillity of mind while we live here; because life itself is but motion, and can never be without desire, nor without fear, no more than without sense.

Subjects have no greater liberty in a popular than in a monarchial state. That which deceives them is the equal participation of command.

Leisure is the Mother of Philosophy.

As soon as a thought darts, I write it down.

It is fairer to tax people on what they extract from the economy, as roughly measured by their consumption, than to tax them on what they produce for the economy, as roughly measured by their income.

Corporations are "worms in the body politic"

The source of every crime, is some defect of the understanding; or some error in reasoning; or some sudden force of the passions. Defect in the understanding is ignorance; in reasoning, erroneous opinion.