11:16-21 It is the duty and practice of Christians to humble themselves, in obedience to the command and example of the Lord; yet prudence must direct in what it is needful to do things which we may do lawfully, even the speaking of what God has wrought for us, and in us, and by us. Doubtless here is reference to facts in which the character of the false apostles had been shown. It is astonishing to see how such men bring their followers into bondage, and how they take from them and insult them.
17. not after the Lord—By inspired guidance he excepts this "glorying" or "boasting" from the inspired authoritativeness which belongs to all else that he wrote; even this boasting, though undesirable in itself, was permitted by the Spirit, taking into account its aim, namely, to draw off the Corinthians from their false teachers to the apostle. Therefore this passage gives no proof that any portion of Scripture is uninspired. It merely guards against his boasting being made a justification of boasting in general, which is not ordinarily "after the Lord," that is, consistent with Christian humility.
foolishly—Greek, "in foolishness."
confidence of boasting—(2Co 9:4).