13 Go and learn what this means, ‘I desire mercy, and not sacrifice.’ For I came not to call the righteous, but sinners.” 14 Then the disciples of John came to him, saying, “Why do we and the Pharisees fast, but your disciples do not fast?” 15 And Jesus said to them, “Can the wedding guests mourn as long as the bridegroom is with them? The days will come, when the bridegroom is taken away from them, and then they will fast. 16 And no one puts a piece of unshrunk cloth on an old garment, for the patch tears away from the garment, and a worse tear is made. 17 Neither is new wine put into old wineskins; if it is, the skins burst, and the wine is spilled, and the skins are destroyed; but new wine is put into fresh wineskins, and so both are preserved.” Matt. 9:13-17
Every time we’ve ever heard this one preached it is about whether or not we should fast. However that is not the lesson the Messiah teaches here.
It is about mercy and not sacrifice. It is about patching with a new cloth and putting new wine in old wine skins. Both of which will make a hole or tear the garment or drain out the wine.