"The great business of the Christian religion is to dispossess us of the brutish nature which is begotten in us" Works Volume 12, pg 41
"The more you indulge the flesh, the more it is your enemy, and the more your slavery and bondage is increased; so that you grow more brutish, forgetful of God, and unapt for any spiritual use" Works Volume 12, pg 47
"We are all debtors, and this duty taketh place as soon as we come to the use of reason; we all then begin to feel the corruption and imperfection of nature; and we are bound to look after the cure of it, and to use all Christ's healing means that it may be affected" Works Volume 12, pg 47
"Your first enemy is the old man; and it is the last, for it is not extinguished in us till death, therefore as soon as we pass out of infancy into youth, we must look upon ourselves as under this obligation, not to live after the flesh , but after the Spirit, to weaken the corruption of nature more and more" Works, Volume 12, pg 48