I was listening to Leviticus on the drive into work today, and made a connection of sorts. In Leviticus 11, we learn that when something unclean falls into a container, everything in the container is made unclean. Leviticus 11:36, however, makes an exception for springs and cisterns, which remain clean in spite of contact with uncleanliness.
This reminded me of John 7:38, where Jesus says, “Whoever believes in me, as the Scripture has said, ‘Out of his heart will flow rivers of living water.’” We often summarize the New Testament as setting aside the ceremonial aspects of the law, including the Levitical clean/unclean laws. Interestingly, it seems that very law provides the mechanism for its obsolescence. If we are springs of living water, abounding with life, death cannot stick to us. We cannot be made unclean by something unclean contacting us.