These [things] have I written unto you
The little children, who were most likely to be imposed upon by antichrists and deceivers:
concerning them that seduce you.
The Syriac, Arabic, and Ethiopic versions render it, "for them that seduce you"; not that they were actually seduced and carried away with the error of the wicked; for though God's elect may be staggered and waver, and be tossed to and fro by false teachers, and their doctrines, yet they cannot be totally and finally deceived: but the sense is, these men endeavoured to seduce them: they lay in wait to deceive, and attempted to deceive them, by walking in craftiness, and handling the word of God deceitfully; and therefore that they might be known, and so shunned and avoided, the apostle points them out, and shows who they are; that they are such who deny that Jesus is the Christ, and do not own neither the Father nor the Son; in doing which he acted the part of a tender Father, a faithful shepherd, and a careful monitor.