1Jn 1:3 That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with his Son Jesus Christ.
1Jn 1:4 And these things write we unto you, that your joy may be full.
1Jn 1:5 This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.
1Jn 1:6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
1Jn 2:3 And hereby we do know that we know him, if we keep his commandments.
1Jn 2:4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
1Jn 2:5 But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.
1Jn 2:6 He that saith he abideth in him ought himself also so to walk, even as he walked.
1Jn 2:7 Brethren, I write no new commandment unto you, but an old commandment which ye had from the beginning. The old commandment is the word which ye have heard from the beginning.
1Jn 2:8 Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.
1Jn 2:9 He that saith he is in the light, and hateth his brother, is in darkness even until now.
1Jn 2:10 He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.
1Jn 2:11 But 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.
LA
This simple gospel truth just escapes those "faith only" followers.