People who think of the sea as a scenic view from the boardwalk as they slurp their snow cones don't understand where Mark is coming from in characterizing the sea. People who have been through a hurricane or a tsunami, however, get it.

Chapter four of Mark is taken up with seed parables: the parable of the sower (4:3-8), the seed growing secretly (4:26-29), and the mustard seed (4:30-32). They teach us that God's rule is "something hidden, indirect, surprising in its manifestation and not easily perceived." (Barton, 41-42)