All men who would surpass the other animals should do their best not to pass through life silently like the beasts whom nature made prone, obedient to their bellies.
SallustWhile the body is young and fine, the soul blunders, but as the body grows old it attains its highest power. Again, every good soul uses mind; but no body can produce mind: for how should that which is without mind produce mind? Again, while the soul uses the body as an instrument, it is not in it; just as the engineer is not in his engines (although many engines move without being touched by any one).
Sallust