Tim Conway on the passage in Luke 5:29-39, the parallel passage of Matthew 9:14-17.
Luke 5:29-39 (ESV)
29 And Levi made him a great feast in his house, and there was a large company of tax collectors and others reclining at table with them.
30 And the Pharisees and their scribes grumbled at his disciples, saying, “Why do you eat and drink with tax collectors and sinners?”
31 And Jesus answered them, “Those who are well have no need of a physician, but those who are sick.
32 I have not come to call the righteous but sinners to repentance.”
33 And they said to him, “The disciples of John fast often and offer prayers, and so do the disciples of the Pharisees, but yours eat and drink.”
34 And Jesus said to them, “Can you make wedding guests fast while the bridegroom is with them?
35 The days will come when the bridegroom is taken away from them, and then they will fast in those days.”
36 He also told them a parable: “No one tears a piece from a new garment and puts it on an old garment. If he does, he will tear the new, and the piece from the new will not match the old.
37 And no one puts new wine into old wineskins. If he does, the new wine will burst the skins and it will be spilled, and the skins will be destroyed.
38 But new wine must be put into fresh wineskins.
39 And no one after drinking old wine desires new, for he says, ‘The old is good.'”