There are two kinds of sin in Hebrew:
When you sin, you find yourself alienated from God, exiled, NOT AT HOME. And so you must RETURN HOME. For Israel physically to the land… for many of us, like the prodigal son, a PHYSICAL RETURN is connected to the SPIRITUAL RETURN.
Repentance and Forgiveness
 “And when all these things come upon you, the blessing and the curse, which I have set before you, and you call them to mind among all the nations where the LORD your God has driven you,  and return to the LORD your God, you and your children, and obey his voice in all that I command you today, with all your heart and with all your soul,  then the LORD your God will restore your fortunes and have mercy on you, and he will gather you again from all the peoples where the LORD your God has scattered you.  If your outcasts are in the uttermost parts of heaven, from there the LORD your God will gather you, and from there he will take you.  And the LORD your God will bring you into the land that your fathers possessed, that you may possess it. And he will make you more prosperous and numerous than your fathers.  And the LORD your God will circumcise your heart and the heart of your offspring, so that you will love the LORD your God with all your heart and with all your soul, that you may live.  And the LORD your God will put all these curses on your foes and enemies who persecuted you.  And you shall again obey the voice of the LORD and keep all his commandments that I command you today.  The LORD your God will make you abundantly prosperous in all the work of your hand, in the fruit of your womb and in the fruit of your cattle and in the fruit of your ground. For the LORD will again take delight in prospering you, as he took delight in your fathers,  when you obey the voice of the LORD your God, to keep his commandments and his statutes that are written in this Book of the Law, when you turn to the LORD your God with all your heart and with all your soul. (ESV)
John the Baptist Prepares the Way
 In those days John the Baptist came preaching in the wilderness of Judea,  “Repent, for the kingdom of heaven is at hand.”  For this is he who was spoken of by the prophet Isaiah when he said,
“The voice of one crying in the wilderness:
‘Prepare the way of the Lord;
make his paths straight.’”
 Now John wore a garment of camel’s hair and a leather belt around his waist, and his food was locusts and wild honey.  Then Jerusalem and all Judea and all the region about the Jordan were going out to him,  and they were baptized by him in the river Jordan, confessing their sins.
 But when he saw many of the Pharisees and Sadducees coming to his baptism, he said to them, “You brood of vipers! Who warned you to flee from the wrath to come?  Bear fruit in keeping with repentance.  And do not presume to say to yourselves, ‘We have Abraham as our father,’ for I tell you, God is able from these stones to raise up children for Abraham.  Even now the axe is laid to the root of the trees. Every tree therefore that does not bear good fruit is cut down and thrown into the fire.
 “I baptize you with water for repentance, but he who is coming after me is mightier than I, whose sandals I am not worthy to carry. He will baptize you with the Holy Spirit and fire.  His winnowing fork is in his hand, and he will clear his threshing floor and gather his wheat into the barn, but the chaff he will burn with unquenchable fire.” (ESV)