Bede the Venerable
Catena Aurea · Markusevangelium 2
And the disciples of John and of the Pharisees used to fast: and they come and say unto him, Why do the disciples of John and of the Pharisees fast, but thy disciples fast not? And Jesus said unto them, Can the children of the bridechamber fast, while the bridegroom is with them? as long as they have the bridegroom with them, they cannot fast. But the days will come, when the bridegroom shall be taken away from them, and then shall they fast in those days. No man also seweth a piece of new cloth on an old garment: else the new piece that filled it up taketh away from the old, and the rent is made worse. And no man putteth new wine into old bottles: else the new wine doth burst the bottles, and the wine is spilled, and the bottles will be marred: but new wine must be put into new bottles.
(ubi sup.) For He compares His disciples to old bottles, who would burst at spiritual precepts, rather than be held in restraint by them. But they will be new bottles, when after the ascension of the Lord, they are renewed by desiring His consolation, and then new wine will come to the new bottles, that is, the fervour of the Holy Ghost will fill the hearts of spiritual men. A teacher must also take heed not to commit the hidden things of new mysteries to a soul, hardened in old wickedness.