Great great grandfather, great grandfather, grandfather, father and self, self and son, son and grandson, from son and grandson on to great grandson and great great grandson. These are the nine agnates, constituting the kinships of man. Affection between father and child, harmony between husband and wife, friendliness on the part of elder brothers, respectfulness on the part of younger brothers, precedence between elders and youngers, as between friend and friend, respect on the part of the sovereign, loyalty on the part of the subject. These ten obligations are common to all men. In the education of the young, there should be explanation and elucidation, careful teaching of the interpretations of commentators, due attention to paragraphs and sentences.