Jesus calls sinners to repentance

And Levi made him a great feast in his own house: and there was a great company of publicans and of others that sat down with them. But their scribes and Pharisees murmured against his disciples, saying, Why do ye eat and drink with publicans and sinners? And Jesus answering said unto them, They that are whole need not a physician: but they that are sick I came not to call the righteous, but sinners to repentance.
(Luk 5:29-32)

1. Defination of Repentance
Strongs number: G3341
μετάνοια
metanoia
met-an'-oy-ah
- From G3340; (subjectively) compunction (for guilt, including reformation); by implication reversal (of [another’s] decision): - repentance.
- Change of mind of
+ purpose formed (mind and soul)
+ something he has done (act of the will)

2. Fruit of repentance

But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come? Bring forth therefore fruits meet for repentance:
(Mat 3:7-8)

3. God’s Goodness leads us to repentance, not because of condemnation

Or despisest thou the riches of his goodness and forbearance and longsuffering; not knowing that the goodness of God leadeth thee to repentance?
(Rom 2:4)

4. Do Christians need to repent?

And he spake this parable unto them, saying, What man of you, having a hundred sheep, if he lose one of them, doth not leave the ninety and nine in the wilderness, and go after that which is lost, until he find it? And when he hath found it, he layeth it on his shoulders, rejoicing. And when he cometh home, he calleth together his friends and neighbors, saying unto them, Rejoice with me; for I have found my sheep which was lost. I say unto you, that likewise joy shall be in heaven over one sinner that repenteth, more than over ninety and nine just persons, which need no repentance.
(Luk 15:3-7)

- Who is the shepherd that went after the sheep?
- Where was the sheep before it wandered off?
- Who is then the sheep?

5. What is the message we preach?

And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
(Luk 24:47)

The God of our fathers raised up Jesus, whom ye slew and hanged on a tree. Him hath God exalted with his right hand to be a Prince and a Savior, for to give repentance to Israel, and forgiveness of sins. And we are his witnesses of these things; and so is also the Holy Ghost, whom God hath given to them that obey him. When they heard that, they were cut to the heart, and took counsel to slay them.
(Act 5:30-33)

6. God’s desire not that we perish but come to repentance. If we therefore don’t repent the danger of perishing is very real

The Lord is not slow concerning His promise, as some count slowness, but is long-suffering toward us, not purposing that any should perish, but that all should come to repentance.
(2Pe 3:9)

7. God desire that we sin no more, after repenting

Afterward Jesus findeth him in the temple, and said unto him, Behold, thou art made whole: sin no more, lest a worse thing come unto thee.
(Joh 5:14)

When Jesus had lifted up himself, and saw none but the woman, he said unto her, Woman, where are those thine accusers? hath no man condemned thee? She said, No man, Lord. And Jesus said unto her, Neither do I condemn thee: go, and sin no more.
(Joh 8:10-11)