1 John 1:10
If we claim that we have not committed sins, we are [in effect] calling God a liar [i.e., because He says we have] and His word [i.e., the real truth about the matter] is not in our hearts.
1 John 5:10
The person who [sincerely] believes in God's Son has the evidence [of it] within his heart, [confirming God's testimony]. The person who does not believe God [i.e., what He says about Jesus], accuses Him of lying, because he has not accepted the [irrefutable] testimony of God concerning [the identity and mission of] His Son.
1 John 1:8
If we claim to have no sinful practices [in our lives], we are self-deceived and are not being truthful about the matter.
Colossians 3:16
You should let the message of Christ live in you abundantly [i.e., as individuals and collectively]. Use [much] wisdom in teaching and warning one another with psalms, hymns and spiritual songs, singing with favor [i.e., with thankfulness] in your hearts toward God.
1 John 2:4
The person who says, "I have come to know Him," but does not obey what He commands, is lying [by such a profession], and the truth [about the matter] is not in his heart.
1 John 2:14
I have written to you little children [i.e., dear ones], because you have known the Father [as your God]. I have written to you fathers, because you have known Him [i.e., Christ], [who has existed] from the beginning. [See verse 13]. I have written to you young men, because you are [spiritually] strong and the word of God continues to live in your hearts, and you have overcome the [power of the] evil one [See verse 13].
1 John 4:4
[But], you people are [followers] of God, little children [i.e., dear ones], and you have overcome them [i.e., these false teachers] because He who is in your lives [i.e., the Holy Spirit, See 3:24] is greater [i.e., more powerful] than he who is in [i.e., dominates] the world [i.e., Satan. See II Cor. 4:4].
2 John 1:2
[We all love you] because of the truth which continues to live in our hearts and will be with us forever.