The image of the sun where it falls appears as a thing which covers the person who attempts to cover it. - Leonardo da Vinci

It is true that impatience, the mother of stupidity, praises brevity, as if such persons had not life long enough to serve them to acquire a complete knowledge of one single subject, such as the human body; and then they want to comprehend the mind of God in which the universe is included, weighing it minutely and mincing it into infinite parts, as if they had to dissect it!

Study without desire spoils the memory, and it retains nothing that it takes in.

A bird makes the same use of wings and tail in the air as a swimmer does of his arms and legs in the water.