Your brain weighs about as much as a cantaloupe and burns roughly a fifth of your body's energy. Much of the brain health advice on social media treats the brain like an organ in a jar. Do a puzzle. Take a supplement. Get more sleep. Some of that helps, but it misses something yoga has understood for centuries. We are multidimensional beings, so brain health must be approached from a multidimensional perspective. Yoga philosophy offers a map that describes five koshas, or dimensions of being human. The koshas are interpenetrating and interdependent sheaths, or layers. Each one is a little