Perhaps the greatest maturity is our ability to conceive the whole universe as our container, our body as a microcosm of that universe, with no boundaries. That is more or less enlightenment. But most of us will need more finite containers for a while, even if we are beginning to learn to make do with intangible ones in a pinch. Indeed, as long as we are in bodies, enlightened or not, we need some bit of tangible safety, or at least a sense of sameness.