People of higher talent work, even if they seem to do nothing
But to me all sciences seem vain and full of error that are not born of experience, mother of all certainty, and do not terminate in an actual experience.
Just as courage is the danger of life, so is fear its safeguard.
Ask counsel of him who rules himself well.
Learning never exhausts the mind.
The length of a man's outspread arms is equal to his height.