I just think of brains like they're anything else, a lot of arrangements of molecules, but animated by other molecules which are arranged in ways that self-replicate (RNA essentially). As a physical organ its structure changes as a result of feedback from continued survival and the environment. Just really complicated patterns of matter and energy that have emerged from the conditions on Earth.

Maybe your brain doesn’t…

“The brain isn’t a computer. Actually, it’s a skinner box.” — this article (which was nonetheless very interesting)