There is always a balance between our senses directed by the ordinary material world of what is knownable a posteriori and the world of experiences created a priori, of itself and complementary to what we do know. It is what we are from the point of view of our memory in the shape of our dna. We can never know what it is in itself. But we act on its impulse. On its instructions or guiding principles.
It is our relation to life.