The brain is marvelous and mysterious. Because of physical processes we do not fully understand, we can see color, hear music, love our partners, remember the past, and dream about the future. We can breathe, digest, regulate blood sugar, and pump blood throughout our bodies without consciously thinking about those things. But the brain plays a key role in pain, disease progression, fitness, and physical wellness. Our expectations, unique social circumstances, life stress, current mindsets, and