Though I have abandoned reading McGilchrist’s The Matter with Things, I’m still noting how many people who know nothing about the hemispheres of the brain nevertheless see our internal divides. For insistence, here’s Kołakowski from The Presence of Myth:
Metaphysical questions and beliefs reveal an aspect of human existence not revealed by scientific questions and beliefs, namely, that aspect that refers intentionally to nonempirical unconditioned reality. The presence of this intention does not guarantee the existence of the referents. It is only evidence of a need, alive in culture, that that to which the intention refers should be present. But this presence cannot in principle be the object of proof, because the proof-making ability is itself a power of the analytical mind, technologically oriented, which does not extend beyond its tasks. The idea of proof, introduced into metaphysics, arises from a confusion of two different sources of energy active in man’s conscious relation to the world: the technological and the mythical.