Each stage of the development process is designed to open us to a vastly larger universe. Perception, what is experience, images of self and reality expands with each stage of development if nature’s plan is met and we remain open. By age fifteen the three primary brain centers should be developed leading to a brain growth spurt and the opening of a fourth brain center, the prefrontal regions which level off around age twenty-one. At twenty-one even far greater unfolding is ready to open if the system is open and the earlier stages are full. The same is true of age thirty. Stage after stage.