As at Sparta, marriages are to be contracted for the good of the state; and they may be dissolved on the same ground, where there is a failure of issue,--the interest of the state requiring that every one of the 5040 lots should have an heir. Divorces are likewise permitted by Plato where there is an incompatibility of temper, as at Athens by mutual consent. The duty of having children is also enforced by a still higher motive, expressed by Plato in the noble words:--'A man should cling to immortality, and leave behind him children's children to be the servants of God in his place.' Again, as at Athens, the father is allowed to put away his undutiful son, but only with the consent of impartial persons (Telfy), and the only suit which may be brought by a son against a father is for imbecility. The class of elder and younger men and women are still to regard one another, as in the Republic, as standing in the relation of parents and children. This is a trait of Spartan character rather than of Athenian. A peculiar sanctity and tenderness was to be shown towards the aged; the parent or grandparent stricken with years was to be loved and worshipped like the image of a God, and was to be deemed far more able than any lifeless statue to bring good or ill to his descendants. Great care is to be taken of orphans: they are entrusted to the fifteen eldest Guardians of the Law, who are to be 'lawgivers and fathers to them not inferior to their natural fathers,' as at Athens they were entrusted to the Archons. Plato wishes to make the misfortune of orphanhood as little sad to them as possible.