Since there was no refrigeration, the grape juice would ferment, producing alcohol and carbon dioxide, which would cause the new skins to expand. Old skins would not work, since they had already been stretched and were no longer elastic. If grape juice were to be put in old wineskins, the expanding carbon dioxide would rupture the wineskins. The wine would run out and be lost and the wineskins would be ruined. The supercultural truths of Judaism are still in effect in Christianity.
Some transcultural truths are still in effect in Christianity.
Many of the cultural truths of Judaism are not in effect in Christianity. An example of a cultural truth in Judaism that is no longer in effect for Christianity is the sacrificial system. The sacrifice of animals in the Old Testament was a type of the real sacrifice of Jesus. An example of a transcultural truth in Judaism is the family stucture. The husband is the administrative head of his wife.