1. The clarification of sin’s definition
4 Everyone who makes a practice of sinning also practices lawlessness; sin is lawlessness. 1 John 3:4 (ESV) 

2. The clarification sin’s defeat
5 You know that he appeared in order to take away sins, and in him there is no sin. 1 John 3:5 (ESV)

29   . . .  “Behold, the Lamb of God, who takes away the sin of the world! John 1:29 (ESV)

22 He committed no sin, neither was deceit found in his mouth. 1 Peter 2:22 (ESV)

15 For we do not have a high priest who is unable to sympathize with our weaknesses, but one who in every respect has been tempted as we are, yet without sin. Hebrews 4:15 (ESV)

3. The clarification of sin’s proponents
6 No one who abides in him keeps on sinning; no one who keeps on sinning has either seen him or known him. 1 John 3:6 (ESV)

4. The clarification of sin’s association
8 Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil. 1 John 3:8 (ESV)

44 You are of your father the devil, and your will is to do your father’s desires. He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he lies, he speaks out of his own character, for he is a liar and the father of lies. John 8:44 (ESV)

14 Since therefore the children share in flesh and blood, he himself likewise partook of the same things, that through death he might destroy the one who has the power of death, that is, the devil, Hebrews 2:14 (ESV)

5. The clarification of sin’s opponents
7 Little children, let no one deceive you. Whoever practices righteousness is righteous, as he is righteous . . .  9 No one born of God makes a practice of sinning, for God’s seed abides in him, and he cannot keep on sinning because he has been born of God. 10 By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother. 1 John 3:7-10 (ESV)

17 Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come. 2 Corinthians 5:17 (ESV)

9 Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practice homosexuality, 10 nor thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God. 11 And such were some of you. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God.
1 Corinthians 6:9-11 (ESV)