To speak ill of a good person is not truly good, all in all.

Do not reveal, if liberty is precious to you; my face is the prison of love.

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.

The Medici made me and the Medici destroyed me.

All our knowledge hast its origins in our perceptions … In nature there is no effect without a cause … Experience never errs; it is only your judgments that err by promising themselves effects such as are not caused by your experiments … Science is the observation of things possible, whether present or past; prescience is the knowledge of things which may come to pass.

The painter strives and competes with nature.

I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils