I John 2:10

Abiding in love is abiding in the light; for the Gospel light not only illumines the understanding, but warms the heart into love. none occasion of stumbling--In contrast to, "He that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes." "In him who loves there is neither blindness nor occasion of stumbling [to himself]: in him who does not love, there is both blindness and occasion of stumbling. He who hates his brother, is both a stumbling-block to himself, and stumbles against himself and everything within and without; he who loves has an unimpeded path" [BENGEL]. John has in mind Jesus' words, Joh 11:9-10. ALFORD well says, "The light and the darkness are within ourselves; admitted into us by the eye, whose singleness fills the whole body with light."

Here the apostle encourages against sins of infirmity (Jo1 2:1, Jo1 2:2), shows the true knowledge and love of God (Jo1 2:3-6), renews the precept of fraternal love (Jo1 2:7-11), addresses the several ages of Christians (Jo1 2:12-14), warns against worldly love (Jo1 2:15-17), against seducers (Jo1 2:18, Jo1 2:19), shows the security of true Christians (Jo1 2:20-27), and advises to abide in Christ (Jo1 2:28, Jo1 2:29).

2:10 To cause others to stumble can also mean to ensnare or entrap them. The Greek word skandalon means a trap or a block in someone’s path. The Gnostics, who taught falsehood about Christ, were hindering people by ensnaring them in error and darkness. • living in the light: A godly life will help, not hinder, the faith of other Christians.