Sin

1 John 2:2 - And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
1 John 3:4 - Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.

1 John 3:7 - Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous.

1 John 3:8 - He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.

1 John 3:9 - Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.

1 John 3:10 - In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.

1 John 3:11 - For this is the message that ye heard from the beginning, that we should love one another.

1 John 3:12 - Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother's righteous.