Sin

Galatians 5:19-21
19The acts of the sinful nature are obvious: sexual immorality, impurity and debauchery; 20idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions 21and envy; drunkenness, orgies, and the like. I warn you, as I did before, that those who live like this will not inherit the kingdom of God.

1 John 2:15-17
15Do not love the world or anything in the world. If anyone loves the world, the love of the Father is not in him. 16For everything in the world—the cravings of sinful man, the lust of his eyes and the boasting of what he has and does—comes not from the Father but from the world. 17The world and its desires pass away, but the man who does the will of God lives forever.

James 4:17
17Anyone, then, who knows the good he ought to do and doesn't do it, sins.

Isaiah 59:1-2
1 Surely the arm of the LORD is not too short to save,
     nor his ear too dull to hear.
2 But your iniquities have separated
     you from your God;
     your sins have hidden his face from you,
     so that he will not hear.

Romans 3:23
23for all have sinned and fall short of the glory of God,

1 John 2:1-2
1My dear children, I write this to you so that you will not sin. But if anybody does sin, we have one who speaks to the Father in our defense—Jesus Christ, the Righteous One. 2He is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world.

Romans 5:12-13
12Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all men, because all sinned— 13for before the law was given, sin was in the world. But sin is not taken into account when there is no law. 14Nevertheless, death reigned from the time of Adam to the time of Moses, even over those who did not sin by breaking a command, as did Adam, who was a pattern of the one to come.
15But the gift is not like the trespass. For if the many died by the trespass of the one man, how much more did God's grace and the gift that came by the grace of the one man, Jesus Christ, overflow to the many!

Romans 7:7-8
7What shall we say, then? Is the law sin? Certainly not! Indeed I would not have known what sin was except through the law. For I would not have known what coveting really was if the law had not said, "Do not covet." 8But sin, seizing the opportunity afforded by the commandment, produced in me every kind of covetous desire. For apart from law, sin is dead.

Romans 8:3-4
3For what the law was powerless to do in that it was weakened by the sinful nature, God did by sending his own Son in the likeness of sinful man to be a sin offering. And so he condemned sin in sinful man, 4in order that the righteous requirements of the law might be fully met in us, who do not live according to the sinful nature but according to the Spirit.

Romans 6:23
23For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.

Romans 5:8
8But God demonstrates his own love for us in this: While we were still sinners, Christ died for us.

Acts 3:19
19Repent, then, and turn to God, so that your sins may be wiped out, that times of refreshing may come from the Lord,

Proverbs 28:13
13 He who conceals his sins does not prosper,
     but whoever confesses and renounces them finds mercy.

Luke 15:7
7I tell you that in the same way there will be more rejoicing in heaven over one sinner who repents than over ninety-nine righteous persons who do not need to repent.

2 Corinthians 5:20-21
20We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God. 21God made him who had no sin to be sin for us, so that in him we might become the righteousness of God.