The general consensus is that we don't really understand how the brain works. We understand computers though, and we assume the brain is just a very advanced computer - that may be true for most part. We also assume that because of the complexity the brain somehow creates consciousness - this reasoning has a few flaws.
It makes more sense for a psychic to assume that consciousness is the basic reality of the universe, and the brain offers a way to manifest that consciousness into human form. In this view, the brain functions as a gateway between human consciousness, human subconsciousness, and the 'consciousness' of everything around us.
The neural network of the brain performs many of the functions of a computer, but it is also the seat of human identity. For practical reasons a psychic may look at the brain as a pulsating 'net' which catches, focuses consciousness and reflects it all around as a mirror. Our presence goes beyond the limitations of our brains and human bodies.
"Cogito ergo sum" - "I think therefore I exist." This is not entirely true, but it gives us some pointers to how our own understanding of ourselves and our world work: we make our thoughts reality and we make reality to be our thoughts. (It may be more accurate to say: "I think, therefore I can add an additional dimension of meaning to my existence.")
Avoid attaching too much importance to thoughts and imprisoning yourself in them. Familiarize yourself with the psychic functions of the brain and align it with other aspects of your being.