27 Later, as Jesus left the town, he saw a tax collector named Levi sitting at his tax collector's booth. "Follow me and be my disciple," Jesus said to him. 28 So Levi got up, left everything, and followed him. 29 Later, Levi held a banquet in his home with Jesus as the guest of honor. Many of Levi's fellow tax collectors and other guests also ate with them. 30 But the Pharisees and their teachers of religious law complained bitterly to Jesus' disciples, "Why do you eat and drink with such scum? " 31 Jesus answered them, "Healthy people don't need a doctor-sick people do. 32 I have come to call not those who think they are righteous, but those who know they are sinners and need to repent."
Matthew Henry's Commentary on Luke 5:27-32
Commentary on Luke 5:27-39
(Read Luke 5:27-39)
It was a wonder of Christ's grace, that he would call a publican to be his disciple and follower. It was a wonder of his grace, that the call was made so effectual. It was a wonder of his grace, that he came to call sinners to repentance, and to assure them of pardon. It was a wonder of his grace, that he so patiently bore the contradiction of sinners against himself and his disciples. It was a wonder of his grace, that he fixed the services of his disciples according to their strength and standing. The Lord trains up his people gradually for the trials allotted them; we should copy his example in dealing with the weak in faith, or the tempted believer.