We may call painting the grandchild of nature.

Darkness is absence of light. Shadow is diminution of light.

Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.

Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.

Experiment is the sole interpreter of the artifices of Nature.

Just as eating against one's will is injurious to health, so studying without a liking for it spoils the memory, and it retains nothing it takes in.

The Medici made me and the Medici destroyed me.