This caution implies the zealous endeavour of the seducers of that time, to instil their poisonous doctrine and principles of licentiousness; and his own solicitude, lest these Christians should receive them, and be mischiefed by them. Whereas therefore they were wont to suggest, that a merely notional knowledge was enough to recommend men, and make them acceptable to God, though they lived never so impure lives; he inculcates, that only they that did righteousness, viz. in a continued course, living comformably to the rules of the gospel, were righteous; and that they must aim to be so, even as he is righteous; not only making the righteousness and holy life of Christ the object of their trust, but the pattern of their walking and practice.
Related Commentaries of 1 John 3:7
1 John 3:7
7 Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous.