Broadly there are two very different spheres of our unconscious nature. The one is primitive and largely sub-human. It consists of all our bodily needs and our so-called instinctive cravings. It is all that we have in common with the beasts together with all that we share with the lowliest of our own human kind. But in addition to this there are seemingly unconscious factors in our nature which, far from being sub—human, constitute the drive of our nature toward experiences and activities of a kind more developed and more lucid than our extant ordinary conscious nature.
The Great Certainty