It's not enough that you believe what you see. You must also understand what you see.
Leonardo da VinciTruly man is the king of beasts, for his brutality exceeds them. We live by the death of others. We are burial places.
Leonardo da VinciNothing is more apt to deceive us than our own judgment of our work. We derive more benefit from having our faults pointed out by our enemies than from hearing the opinions of friends.
Leonardo da Vinci