Why are the bones of great fishes, and oysters and corals and various other shells and sea-snails, found on the high tops of mountains that border the sea, in the same way in which they are found in the depths of the sea?

Of the four elements water is the second in weight and the second in respect of mobility. It is never at rest until it unites with the sea.

The Medici created and destroyed me.

I have from an early age abjured the use of meat, and the time will come when men such as I will look upon the murder of animals as they now look upon the murder of men.

Truth is so excellent, that if it praises but small things they become noble.

Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.

Small rooms or dwellings set the mind in the right path, large ones cause it to go astray.