When you run into something interesting, drop everything else and study it.
Study history, study history. In history lies all the secrets of statecraft.
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.
I made a study of the ancient and indispensable art of bread-making,
At fifteen my mind was directed to study, and at thirty I knew where to stand.
Study the past if you would define the future.
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.