Though I may not . . . be able to quote other authors, I shall rely on that which is much greater and more worthy - on experience.
Leonardo da VinciThis work should commence with the conception of man, and should describe the nature of the womb, and how the child inhabits it, and in what stage it dwells there, and the manner of its quickening and feeding, and its growth, and what interval there is between one stage of growth and another, and what thing drives it forth from the body of the mother, and for what reason it sometimes emerges from the belly of its mother before the due time.
Leonardo da VinciBeing engulfed in practice without delicate knowledge related to it, is in many ways like entering a ship without knowing where it is headed.
Leonardo da Vinci