What is called youth in general terms is particularly the springtime of the physical body; and therefore if the child is physically well nourished and well drilled, so that he shows power and energy in every movement, it makes him fit for any sort of work that he may desire to learn, and for making his way in life. Seeing the youth enthusiastic and vigorous, the parents sometimes do not consider the fact that every burden, physical or mental, which might weigh him down is most injurious at this period of his life, although at a later age the same burden would not be so harmful. Youth being the time of full bloom, if the child does not show abundant energy and enthusiasm then at what other time will it do so? Therefore it is necessary that by physical exercise, proper rest, and good nourishment the youth is kept in perfect balance.