13:1-6 Though it is God's gracious method to bear long with sinners, yet he will not bear always; at length he will come, and will not spare those who remain obstinate and impenitent. Christ at his crucifixion, appeared as only a weak and helpless man, but his resurrection and life showed his Divine power. So the apostles, how mean and contemptible soever they appeared to the world, yet, as instruments, they manifested the power of God. Let them prove their tempers, conduct, and experience, as gold is assayed or proved by the touchstone. If they could prove themselves not to be reprobates, not to be rejected of Christ, he trusted they would know that he was not a reprobate, not disowned by Christ. They ought to know if Christ Jesus was in them, by the influences, graces, and indwelling of his Spirit, by his kingdom set up in their hearts. Let us question our own souls; either we are true Christians, or we are deceivers. Unless Christ be in us by his Spirit, and power of his love, our faith is dead, and we are yet disapproved by our Judge.
2. Rather, "I have already said (at my second visit), and tell you (now) beforehand, AS (I did) WHEN I WAS PRESENT THE SECOND TIME, SO also NOW in my absence (the oldest manuscripts omit the 'I write,' which here wrongly follows in English Version Greek text) to them which heretofore have sinned (namely, before my second visit, 2Co 12:21), and to all others (who have sinned since my second visit, or are in danger of sinning)." The English Version, "as if I were present the second time," namely, this next time, is quite inconsistent with 2Co 13:1, "this is the third time I am coming to you," as Paul could not have called the same journey at once "the second" and "the third time" of his coming. The antithesis between "the second time" and "now" is palpable.
if I come again, &c.—that is, whensoever I come again (Ac 20:2). These were probably the very words of his former threat which he now repeats again.