Jesus's saying about new wine and old wineskins appears in all three Synoptic Gospels (Matthew 9:17, Mark 2:22, Luke 5:37-38), suggesting it was a stable and important element of his teaching. The context in all three is the question of fasting: why do Jesus's disciples not fast as the Pharisees and John's disciples do? Jesus responds with a series of analogies - the bridegroom at a wedding, unshrunk cloth patched onto old garments, new wine in old wineskins - all pointing to the same insight: the new reality he is inaugurating is incompatible with the forms designed to contain the old.
The wineskin analogy depends on an understanding of how wine fermentation worked in the ancient world. New wine continues to ferment after being poured into skins; as it ferments it produces gas and expands. Old wineskins have already been stretched to their maximum capacity; they have lost the flexibility to accommodate further expansion. Pouring new wine into old skins therefore leads to rupture - the skins burst, the wine spills, both are lost. New wine requires new skins: containers with sufficient elasticity to accommodate the expansion.
The saying is first and foremost a claim about Jesus's own mission: he is not bringing a reformed version of existing religious practice but something genuinely new that cannot be contained within existing structures without destroying both. The specific issue of fasting (which the context raises) is an instance of a general principle about the relationship between new movements and inherited institutional forms.
In English usage the phrase has become a standard metaphor for the problem of innovation within established structures. Technology, education, government, corporate management, and religious institutions all regularly encounter the new wine problem: an innovative approach, principle, or practice that cannot function within the existing organizational forms without destroying them. The choices are to abandon the new wine (return to established practice), burst the old skins by forcing incompatible forms together, or create new structures capable of containing the new reality.
Organization theorists and business historians have analyzed countless cases through the wineskin framework: the attempt to run internet-era businesses through pre-internet organizational structures (old skins), the failure of established newspapers to accommodate digital journalism within their existing revenue models, the difficulty of agile development methodologies within waterfall-structured corporations. In each case the biblical metaphor captures the structural incompatibility precisely: it is not that the new content is inherently better than the old, but that the mismatch between content and container produces failure.
In religious life the saying has obvious application to every period of reform. Luther's theology could not be contained within the structures of medieval Catholicism - new wine, old skins, inevitable rupture. The charismatic movement's encounter with established liturgical churches repeated the pattern. New theological or spiritual insight regularly faces the question: can this be integrated into existing forms, or does it require new structures?
Luke's version of the saying adds a detail not in Matthew or Mark: 'And no man having drunk old wine straightway desireth new: for he saith, The old is better.' This observation - that those habituated to old wine are not easily persuaded to try new wine - adds a psychological dimension to the structural one: the resistance to new structures is not merely institutional inertia but a genuine preference developed over time. The old feels better precisely because it is familiar.