tell our children to pray when they are seven years old, and to smack them (lightly) if they do not pray when they are ten years old, even though they are not obliged to do that yet, so that they may be trained in doing acts of worship and obedience and may get used to them, so that it will be easy for them to do that after they grow up and it will be dear to them. The same applies to all matters that are blameworthy; young children should not get used to them even though they are not yet under any obligation, because otherwise they will get used to them when they grow up and will enjoy indulging in them.