Therefore, sin is lawlessness or anti-law.
Sin is also a defilement of one's conscience.
When a person knows to do good and does it not, to him it is sin. The ultimate penalty for sin is eternal death. Upon deep and sincere repentance toward God, one's sins can be forgiven by faith in the blood and sacrifice of Jesus Christ for the payment of those sins through the mercy of God the Father. The only unpardonable sin is persistent, knowledgeable and willful transgression of the commandments and laws of God. This sin cannot be forgiven because it is willful rejection of God's salvation, willful rejection of and blasphemy against the Holy Spirit of God the Father, and despising the sacrifice of Jesus Christ as an unholy thing.