We do not get this living water by osmosis. Just as we must drink literal water to survive, we need also risk changing our lives by taking the initiative to be open to the Holy Spirit. The initiative to drink the living water is a grace in itself. But just as we can refuse literal water, we also have the choice not to accept the Holy Spirit.Burghardt and Waldron offer preachers "four suggestions as starting points for preaching sermons that go beyond the obvious." It's good stuff.
Update: Here's another brief study of John 4 at To the Word.