“He proceeds to say: ‘As the branch cannot bear fruit of itself, except it abide in the vine; no more can you, except ye abide in me.’ A great encomium on grace, my brethren,— one that will instruct the souls of the humble, and stop the mouths of the proud. Let those now answer it, if they dare, who, ignorant of God’s righteousness, and going about to establish their own, have not submitted themselves unto the righteousness of God. Let the self-complacent answer it, who think they have no need of God for the performance of good works. Fight they not against such a truth, those men of corrupt mind, reprobate concerning the faith, whose reply is only full of impious talk, when they say: It is of God that we have our existence as men, but it is of ourselves that we are righteous? What is it you say, you who deceive yourselves, and, instead of establishing freewill, cast it headlong down from the heights of its self-elevation through the empty regions of presumption into the depths of an ocean grave? Why, your assertion that man of himself works righteousness,
that is the height of your self-elation. But the Truth contradicts you, and declares, The branch cannot bear fruit of itself, except it abide in the vine. Away with you now over your giddy precipices, and, without a spot whereon to take your stand, vapor away at your windy talk. These are the empty regions of your presumption. But look well at what is tracking your steps, and, if you have any sense remaining, let your hair stand on end. For whoever imagines that he is bearing fruit of himself is not in the vine, and he that is not in the vine is not in Christ, and he that is not in Christ is not a Christian. Such are the ocean depths into which you have plunged” (St. Augustine,
The Gospel of John, Tractate 53).