Thomas Hobbes

Leisure is the mother of philosophy.

I put for the general inclination of all mankind, a perpetual and restless desire of power after power, that ceaseth only in death.

I am about to take my last voyage, a great leap in the dark.

The condition of man... is a condition of war of everyone against everyone.

The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.

It is not wisdom but Authority that makes a law.

No arts; no letters; no society; and which is worst of all, continual fear and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.

Curiosity is the lust of the mind.