Here is a thing which the more it is needed the more it is rejected: and this is advice, which is unwillingly heeded by those who most need it, that is to say, by the ignorant.

The Medici made me and the Medici destroyed me.

Every action done by nature is done in the shortest way.

I have always felt it is my destiny to build a machine that would allow man to fly.

O speculators about perpetual motion, how many vain chimeras have you created in the like quest? Go and take your place with the seekers after gold.

He who has access to the fountain does not go to the water-pot.

I roamed the countryside searching for answers to things I did not understand.