When Jesus is called the Lamb of God in John 1:29 and John 1:36, it is referring to Him as the perfect and ultimate sacrifice for sin. In order to understand who Christ was and what He did, we must begin with the Old Testament, which contains prophecies concerning the coming of Christ as a “guilt offering” (Isaiah 53:10). In fact, the whole sacrificial system established by God in the Old Testament set the stage for the coming of Jesus Christ, who is the perfect sacrifice God would provide as atonement for the sins of His people (Romans 8:3; Hebrews 10). https://gotquestions.org/Jesus-Lamb-of-God.html
Leviticus 5:15“When anyone is unfaithful to the LORD by sinning unintentionally in regard to any of the LORD’s holy things, they are to bring to the LORD as a penalty a ram from the flock, one without defect and of the proper value in silver, according to the sanctuary shekel. It is a GUILT OFFERING.
''But anyone who sins defiantly,(which means bold disobedience ) whether native-born or foreigner, blasphemes the LORD and must be cut off from the people of Israel. …
Numbers 15:29 You shall have one law for him who does anything unintentionally, for him who is native among the sons of Israel and for the alien who sojourns among them.
30But the person who does anything defiantly, whether he is native or an alien, that one is blaspheming the LORD; and that person shall be cut off from among his people. 31Because he has despised the word of the LORD and has broken His commandment, that person shall be completely cut off; his guilt will be on him.'"…
Can you really live in sin and believe your sins are covered? I don't know...well not according to the guilt offering.
Isaiah 53:10But the LORD was pleased To crush Him, putting Him to grief; If He would render Himself as a GUILT OFFERING, He will see His offspring, He will prolong His days, And the good pleasure of the LORD will prosper in His hand.