If a man has a tent made of linen of which the apertures have all been stopped up, and be it twelve bracchia across (over twenty-five feet) and twelve in depth, he will be able to throw himself down from any height without sustaining injury. [His concept of the parachute.]

Thou, O God, dost sell us all good things at the price of labor.

Nothing will be left, Nothing in the air, nothing under the earth, nothing in the waters. All will be exterminated.

To discover the soul living in somebody's body, we watch the surrounding of the body, and if it's messy and disordered, so is the soul.

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.

You grow in reputation like bread in the hands of a child.

The eye transmits its own image through the air to all the objects which face it, and also receives them on its own surface, whence the "sensus communis" takes them and considers them.