Study as if you were going to live forever; live as if you were going to die tomorrow.

War should be the only study of a prince. He should consider peace only as a breathing-time, which gives him leisure to contrive, and furnishes as ability to execute, military plans.

War should be the only study of a prince. he should consider peace only as a breathing-time, which gives him leisure to contrive, and furnishes as ability to execute, military plans.

At fifteen my mind was directed to study, and at thirty I knew where to stand.

The study and knowledge of the universe would somehow be lame and defective were no practical results to follow.

To know oneself is to study oneself in action with another person.