In youth an extra energy is born which expresses itself in passion and emotion; if the parents do not know how to deal with it the child can easily abuse it. There is no end of abuse of energy to be found in the world today in spite of all the attention that seems to be awakening in various educational centers. The idea is that it is no use watching a child, for this shows lack of trust; nor is it right to correct a child when it has gone too far in a certain playful tendency. There is no end of temptation which attracts a youth. It is natural for a youth who has just passed his period of playfulness to continue to play in the ways which to him seem harmless. An important part of the education of a youth is therefore to be told things plainly, and to be made aware of the advantages and disadvantages of various interests in life. It is not much use for a child to read books concerning the life of youth. Personal advice on the subjects in question will prove to be more effective.