There is an ocean of sorrow. Its surface is calm, its water clear, and in it we can see depths we can never hope to reach.
There is an ocean of fear. Its waters are ever-turbulent, so that we can only imagine what dangers lie within its depths.
Between the two runs the thinnest of islands, barely existing amidst the endless stretches of water. But on this island, there is neither sorrow nor fear. It is an island upon which we can find perfect contentedness.
The ocean of sadness is the past. Should we attempt to do more than wade in it, we will be sucked down by our memories and drown in our regrets and our loss.
The ocean of fear is the future. It holds within it not only imagined horrors, but also our inevitable death and the wreck of all that now is. We may believe we can navigate it by the stars, but once we lose sight of the island, we will soon lose our bearings as fearful waves crash down upon us.
The island that separates the two is the now. On it, we are free from sorrow and fear. On it, we can find peace without cessation.