There is great difficulty in the training of youth, because in youth a child becomes less receptive. The child is passive and therefore easy to guide, but youth is the time of rising energy, both physical and mental; therefore youth is expressive, and what is expressive cannot be receptive at the same time. Parents make a great mistake when they continue the same method with a youth which they applied in his childhood. There is the time of ploughing, there is the time of sowing, and there is the time of reaping the harvest; it is not all done at the same time.