An ordinary visit to a beautiful garden always creates an extraordinary time!

Truth wanders everywhere, but especially and frequently, it wanders in the silence. To meet with it, you wander in the silence too.

History of science is a relay race, my painter friend. Copernicus took over his flag from Aristarchus, from Cicero, from Plutarch; and Galileo took that flag over from Copernicus.

A dry well is not a friend of a thirsty man; and an ignorant man, of the progression!

Do you want your name to live forever? You fool! Forget your name, try to save yourself! What use there is for you, if your name lives and you die? You fool!

Great thoughts cannot remain silent. They are born to scream!

In times of war, don't touch the guns; stay as a human! Always refuse to be a killer!