1 John 2:4

4 He who says "I know him" but disobeys his commandments is a liar, and the truth is not in him;

1 John 2:4 Meaning and Commentary

1 John 2:4

He that saith I know him
God or Christ, as the Gnostics did, who pretended to great, even perfect, knowledge of divine things:

and keepeth not his commandments;
which the above persons had no regard to, and as many who profess great light and knowledge in our days show no concern for:

is a liar;
he contradicts what he says, and gives the lie to it; for though in words he professes to know God, in works he denies him, and which betrays his ignorance of him:

and the truth is not in him;
there is no true knowledge of God and Christ in him; nor is the truth of the Gospel in his heart, however it may be in his head; nor is the truth of grace in him, for each of these lead persons to obedience. The Ethiopic version renders it, "the truth of God is not with him"; (See Gill on 1 John 1:8).

1 John 2:4 In-Context

2 and he is the expiation for our sins, and not for ours only but also for the sins of the whole world.

3 And by this we may be sure that we know him, if we keep his commandments.

4 He who says "I know him" but disobeys his commandments is a liar, and the truth is not in him;

5 but whoever keeps his word, in him truly love for God is perfected. By this we may be sure that we are in him:

6 he who says he abides in him ought to walk in the same way in which he walked.