All our power lies in both mind and body; we employ the mind to rule, the body rather to serve; the one we have in common with the Gods, the other with the brutes.
Sed nostra omnis vis in animo et corpore sita est; animi imperio, corporis servitio magis utimur; alterum nobis cum dis, alterum cum beluis commune est.
Original text (Latin)
Notes from Wikiquote
Chapter I