Whoever despises the high wisdom of mathematics nourishes himself on delusion and will never still the sophistic sciences whose only product is an eternal uproar.
Leonardo da VinciOf several bodies, all equally large and equally distant, that which is most brightly illuminated will appear to the eye nearest and largest.
Leonardo da VinciMusic cannot be called otherwise than the sister of painting, for she is dependent upon hearing, a sense second to sight, and her harmony is composed of the union of its proportional parts sounded simultaneously, rising and falling in one or more harmonic rhythms.
Leonardo da Vinci