Mark 2:13-17
13 Once again Jesus went out beside the lake. A large crowd came to him, and he began to teach them. 14 As he walked along, he saw Levi son of Alphaeus sitting at the tax collector’s booth. “Follow me,” Jesus told him, and Levi got up and followed him.
15 While Jesus was having dinner at Levi’s house, many tax collectors and sinners were eating with him and his disciples, for there were many who followed him.16 When the teachers of the law who were Pharisees saw him eating with the sinners and tax collectors, they asked his disciples: “Why does he eat with tax collectors and sinners?”
17 On hearing this, Jesus said to them, “It is not the healthy who need a doctor, but the sick. I have not come to call the righteous, but sinners.”
Luke 5:32
“I have not come to call the righteous, but sinners to repentance.”
Matthew 9:12-13
12 On hearing this, Jesus said, “It is not the healthy who need a doctor, but the sick. 13 But go and learn what this means: ‘I desire mercy, not sacrifice.’ For I have not come to call the righteous, but sinners.”
Matthew 21:28-32
28 “What do you think? There was a man who had two sons. He went to the first and said, ‘Son, go and work today in the vineyard.’
29 “‘I will not,’ he answered, but later he changed his mind and went.
30 “Then the father went to the other son and said the same thing. He answered, ‘I will, sir,’ but he did not go.
31 “Which of the two did what his father wanted?”
“The first,” they answered.
Jesus said to them, “Truly I tell you, the tax collectors and the prostitutes are entering the kingdom of God ahead of you. 32 For John came to you to show you the way of righteousness, and you did not believe him, but the tax collectors and the prostitutes did. And even after you saw this, you did not repent and believe him.
Luke 19:1-10
19 Jesus entered Jericho and was passing through. 2 A man was there by the name of Zacchaeus; he was a chief tax collector and was wealthy. 3 He wanted to see who Jesus was, but because he was short he could not see over the crowd. 4 So he ran ahead and climbed a sycamore-fig tree to see him, since Jesus was coming that way.
5 When Jesus reached the spot, he looked up and said to him, “Zacchaeus, come down immediately. I must stay at your house today.” 6 So he came down at once and welcomed him gladly.
7 All the people saw this and began to mutter, “He has gone to be the guest of a sinner.”
8 But Zacchaeus stood up and said to the Lord, “Look, Lord! Here and now I give half of my possessions to the poor, and if I have cheated anybody out of anything, I will pay back four times the amount.”
9 Jesus said to him, “Today salvation has come to this house, because this man, too, is a son of Abraham.10 For the Son of Man came to seek and to save the lost.”
The Call of Christ is a Call to Repentance
Repentance is turning. Turning from sin, and turning to God.
Luke 1:16
And he will turn many of the children of Israel to the Lord their God,
1 Thessalonians 1:9
For they themselves report concerning us the kind of reception we had among you, and how you turned to God from idols to serve the living and true God,
Acts 26:17b-18
The Gentiles—to whom I am sending you 18 to open their eyes, so that they may turn from darkness to light and from the power of Satan to God, that they may receive forgiveness of sins and a place among those who are sanctified by faith in me.’
Repentance Brings Real Change
Luke 3:7-14
7 John said to the crowds coming out to be baptized by him, “You brood of vipers! Who warned you to flee from the coming wrath? 8 Produce fruit in keeping with repentance. And do not begin to say to yourselves, ‘We have Abraham as our father.’ For I tell you that out of these stones God can raise up children for Abraham.9 The ax is already at the root of the trees, and every tree that does not produce good fruit will be cut down and thrown into the fire.”
10 “What should we do then?” the crowd asked.
11 John answered, “Anyone who has two shirts should share with the one who has none, and anyone who has food should do the same.”
12 Even tax collectors came to be baptized. “Teacher,” they asked, “what should we do?”
13 “Don’t collect any more than you are required to,” he told them.
14 Then some soldiers asked him, “And what should we do?”
He replied, “Don’t extort money and don’t accuse people falsely—be content with your pay.”
Ephesians 4:17-28
17 So I tell you this, and insist on it in the Lord, that you must no longer live as the Gentiles do, in the futility of their thinking. 18 They are darkened in their understanding and separated from the life of God because of the ignorance that is in them due to the hardening of their hearts. 19 Having lost all sensitivity,they have given themselves over to sensuality so as to indulge in every kind of impurity, and they are full of greed.
20 That, however, is not the way of life you learned 21 when you heard about Christ and were taught in him in accordance with the truth that is in Jesus. 22 You were taught, with regard to your former way of life, to put off your old self, which is being corrupted by its deceitful desires; 23 to be made new in the attitude of your minds; 24 and to put on the new self, created to be like God in true righteousness and holiness.
25 Therefore each of you must put off falsehood and speak truthfully to your neighbor, for we are all members of one body. 26 “In your anger do not sin”: Do not let the sun go down while you are still angry, 27 and do not give the devil a foothold. 28 Anyone who has been stealing must steal no longer, but must work, doing something useful with their own hands, that they may have something to share with those in need.
29 Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen. 30 And do not grieve the Holy Spirit of God, with whom you were sealed for the day of redemption. 31 Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice. 32 Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.
Matthew Repents
Matthew turned from his former vocation, leaving his tax collecting booth, just as those Galilean fishermen left their boats and their father (cf. Luke 5:28). Other tax collectors might be able to walk honestly in their profession, but not Matthew (Luke 3:12-13). Just as other fishermen might glorify God through their hard work (1 Thessalonians 4:11-12), but not Peter, Andrew, James or John.
Matthew answered the call of Christ and became a full time apostle. After the resurrection, he preached the Gospel among the Jews in Judea. Church tradition records that he later evangelized Ethiopia, winning many to Christ and becoming the apostle of that nation, where he was ultimately martyred for his godly stands. To fully answer the call of Christ consumed Matthew’s remaining years and cost him everything.
Others can, you can’t. While not everyone is called to be a full-time apostle, everyone is called to be a full-time disciple. You can’t live the same way as before because you’re not the same person. That old man is dead. Stop trying to bring back what was crucified with Christ. You can’t laugh at the same jokes, walk in the same circles (Psalm 1), spend your time and money how you once you did, as if it were all yours to spend. You were bought with a price.