The Medici created and destroyed me.
One day the world will look upon research upon animals as it now looks upon research on human beings.
...The world wouldn't be the world, without trouble.
Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.
Life, when is spent well, is long.
The lover is moved by the beloved object as the senses are by sensual objects; and they unite and become one and the same thing. The work is the first thing born of this union; if the thing loved is base the lover becomes base.