It is very necessary for these five different subjects to be taught in infancy. Besides that, regularity should be observed in everything concerning an infant. In its food, in its sleep, in everything there must be regularity, because nature is rhythmic. The four seasons come regularly; the rising and the setting of the sun, and the waxing and the waning of the moon, all show that nature is rhythmic. By observing the rules of regularity with an infant one can build a foundation for a soul to grow up most successfully.