Do you remember?
The feeling you get when you jump in, feet first, not caring if you fall farther than you planned, not caring if you had enough breath or if your bathing suit would slip free, leaving you exposed in the cool, smooth water?
Do you remember the way you feel when you realize you jumped in too deep and the wave of panic that tingles right down to the toes that touch the rocky bottom?
How long do you linger at that ever distant bottom wondering if you'll make it, tempting fate and your lungs to see how long you can endure?
Not long, I presume, for it's not the lungs that fight and fate is not easily tempted. Shortly after reaching the bottom, it's your soul that sets the feet in motion and your heart that keeps them going.
It's knowing that whatever depth you reached and however far you fell, your only hope for survival is to swim to the surface.
Never forget the feeling of the bottom, because it helps you to keep swimming to the surface.