Paul speaks of people's lives as if they were objects that can be hidden in containers and speaks of God as if he were a container. Alternate translation: Possible meanings are 1) "it is as though God has taken your life and concealed it with Christ in God's presence" or 2) "only God knows what your true life really is, and he will reveal it when he reveals Christ" (See: [[rc://en/ta/man/translate/figs-activepassive]] and [[rc://en/ta/man/translate/figs-metaphor]])