Those who understand these ideas realize that youth is the greatest opportunity that comes in life; it never comes again. Life's spring-time never returns; it comes only once; and when that opportunity is taken away and the youth has not been inspired as he should be, it is just like keeping a plant without watering it. For that is the very time it should be watered, that is the time for it to be reared; and that time should not be neglected. There are thousands and millions of young people in the colleges who have had no good manners taught to them, and no inspiration given to them. When they are grown-up they can show that they have passed examinations, that they have gained a lot of knowledge; yet the knowledge which enables the soul to develop, has been neglected during their youth, during the time when the mind is receptive, and when the child with all its enthusiasm and capacity for concentration can grasp everything that is good and beautiful.