A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.
Leonardo da VinciA day will come in which men will look upon an animal's murder the same way they look today upon a man's murder.
Leonardo da VinciThe Bactrian have two humps; the Arabian one only. They are swift in battle and most useful to carry burdens. This animal is extremely observant of rule and measure, for it will not move if it has a greater weight than it is used to, and if it is taken too far it does the same, and suddenly stops and so the merchants are obliged to lodge there.
Leonardo da Vinci