Learning is enhanced by challenge and inhibited by threat. That is why we need to create and maintain an atmosphere of relaxed alertness, involving low threat and high challenge. Learning engages the entire physiology. Learning is as natural as breathing, and a learning environment may either inhibit or facilitate it. Anything that affects our physiological functioning affects our capacity to learn.
Every brain is unique.
We all have the same set of systems, and yet we are all different. That is why choice, variety, and multisensory processes are essential.