I grew up in Southern California.  When I was young, I tried very hard to learn to surf.  I never became much of a surfer: I was tossed around badly by the waves.  We look at the Book of James where we are told that our faith must not be weak, like a wave blown by the wind.  In Ephesians, we are told that our faith must not be tossed to and fro by waves.  We look at the use of ocean waves as a metaphor for the intense power that our faith must be able to withstand.