Oysters open completely when the moon is full; and when the crab sees one it throws a piece of stone or seaweed into it and the oyster cannot close again so that it serves the crab for meat. Such is the fate of him who opens his mouth too much and thereby puts himself at the mercy of the listener.

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.

All thoughts start from emotions.

Just as courage is the danger of life, so is fear its safeguard.

The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.

Fear arises sooner than anything else.

I have been impressed with the urgency of doing.