when that was expired, they returned, but the young Jesus staid behind in Jerusalem, without being miss'd either by Joseph or his Mother.

For whoever would [try to] save his life [i.e., by neglecting spiritual things] will lose it [i.e., miss out on the blessings of God]. But whoever [willingly] loses his life [i.e., in commitment to God's service] for my sake, that person will save it [i.e., obtain both temporal and spiritual blessings].