" But this 'structural' or concrete a priori is neither a Kantian category nor even a Hegelian idea; it is the universal ground of sense=the sense funally, far fro, being an idea, is a ground. Philosophy seeks in the archeology of the ground, in the depth and not in the height (the ideas)...the ground in the literal sense: the earth. "

― Maurice Merleau-Ponty , Husserl at the Limits of Phenomenology