When we hear of deep blue sea,the first thing that comes to our mind is a big sea that is really deep.and when you fall into it,you know you are in for it.Bringing it down to the human aspect of life,it can be seen as falling into a situation that you feel there is no hope.It is like being in the middle of no where.There is no problem that has no solution.So even you feel you are in a bad situation,and there is no one to call on,there is a God who is ready to be your life guard in that deep blue sea and He is ready to bring you out when you are drowning.