Wine and wineskins
All three synoptic gospels has an interesting story about wine and wineskins. I take the version of Luke here (others are not very different).
And no one puts new wine into old wineskins; otherwise the new wine will burst the skins and will be spilled, and the skins will be destroyed. But new wine must be put into fresh wineskins. (Luke 5, 37 -38)
The classical interpretation is that the kingdom of God (or the teachings of Jesus) is the new wine, which shouldn’t be put into our old wine…