The sea is representing all that there is that lies beneath the surface. The surface of the sea is made up of exactly what lies below. there is no skin, no superficial layer. out here, there is nothing except for the sea. Sea. See?
As it is true out here that nothing exists besides the sea, on land nothing is real except for that which exists below the surface. there, the superficial layer does not represent what lies below.
it is that, the only, which is us.