Leisure is the mother of philosophy.

Thomas Hobbes

Science is the knowledge of consequences, and dependence of one fact upon another.

Thomas Hobbes

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.

Thomas Hobbes

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.

Thomas Hobbes