Tertullian

“ Choose that which is good: if you cannot, because you will not—for that you can if you will He has shown, because He has proposed each to your free-will—you ought to depart from Him whose will you do not. ”

“ The time for its indulgence was (the interval) until the Paraclete began His operations, to whose coming were deferred by the Lord (the things) which in His day “could not be endured;” which it is now no longer competent for any one to be unable to endure, seeing that He through whom the power of enduring is granted is not wanting. How long shall we allege “the flesh,” because the Lord said, “the flesh is weak?” [6] But He has withal premised that “the Spirit is prompt,” in order that the Spirit may vanquish the flesh—that the weak may yield to the stronger. ”