How do you get to the edge of the field?

What cuts lines into pure air to create dimension, space, thatness and thereness? The sea is the sky, like a great mirror, and so does shadow cause the light to wane, and no one knows.  Everything has a center, balance is essential.  Balance is everything.  One cannot conceive light without dark, up without down, this without that to juxtapose it.  Reflective, the days separate the nights.  Water separates air, and corners separate corners.  Angles cause a stir in perception and make us follow the lines all around our minds.