Fire is to represent truth because it destroys all sophistry and lies; and the mask is for lying and falsehood which conceal truth.
Leonardo da VinciThe knowledge of the past times and of the places of the earth is both an ornament and nutriment to the human mind.
Leonardo da VinciHere 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.
Leonardo da Vinci