c. 207–212 · Tertullian, Against Marcion (Adversus Marcionem) 2.7
You ought, however, to deduct from God’s attributes both His supreme earnestness of purpose and most excellent truth in His whole creation, if you would cease to inquire whether anything could have happened against the will of God. For, while holding this earnestness and truth of the good God, which are indeed capable of proof from the rational creation, you will not wonder at the fact that God did not interfere to prevent the occurrence of what He wished not to happen, in order that He might keep from harm what He wished. For, since He had once for all allowed (and, as we have shown, worthily allowed) to man freedom of will and mastery of himself, surely He from His very authority in creation permitted these gifts to be enjoyed: to be enjoyed, too, so far as lay in Himself, according to His own character as God, that is, for good (for who would permit anything hostile to himself?); and, so far as lay in man, according to the impulses of his liberty (for who does not, when giving anything to any one to enjoy, accompany the gift with a permission to enjoy it with all his heart and will?). The necessary consequence, therefore, was, that God must separate from the liberty which He had once for all bestowed upon man (in other words, keep within Himself), both His foreknowledge and power, through which He might have prevented man’s falling into danger when attempting wrongly to enjoy his liberty. Now, if He had interposed, He would have rescinded the liberty of man’s will, which He had permitted with set purpose, and in goodness.