The great error in these and similar speculations is that the difference between man and the animals is forgotten in them. The human being is regarded with the eye of a dog- or bird-fancier (v. 459 A), or at best of a slave-owner; the higher or human qualities are left out. The breeder of animals aims chiefly at size or speed or strength; in a few cases at courage or temper; most often the fitness of the animal for food is the great desideratum. {clxxxiii} But mankind are not bred to be eaten, nor yet for their superiority in fighting or in running or in drawing carts. Neither does the improvement of the human race consist merely in the increase of the bones and flesh, but in the growth and enlightenment of the mind. Hence there must be 'a marriage of true minds' as well as of bodies, of imagination and reason as well as of lusts and instincts. Men and women without feeling or imagination are justly called brutes; yet Plato takes away these qualities and puts nothing in their place, not even the desire of a noble offspring, since parents are not to know their own children. The most important transaction of social life, he who is the idealist philosopher converts into the most brutal. For the pair are to have no relation to one another, except at the hymeneal festival; their children are not theirs, but the state's; nor is any tie of affection to unite them. Yet here the analogy of the animals might have saved Plato from a gigantic error, if he had 'not lost sight of his own illustration' (ii. 375 D). For the 'nobler sort of birds and beasts' (v. 459 A) nourish and protect their offspring and are faithful to one another. An eminent physiologist thinks it worth while 'to try and place life on a physical basis.' But should not life rest on the moral rather than upon the physical? The higher comes first, then the lower, first the human and rational, afterwards the animal. Yet they are not absolutely divided; and in times of sickness or moments of self-indulgence they seem to be only different aspects of a common human nature which includes them both. Neither is the moral the limit of the physical, but the expansion and enlargement of it,--the highest form which the physical is capable of receiving. As Plato would say, the body does not take care of the body, and still less of the mind, but the mind takes care of both. In all human action not that which is common to man and the animals is the characteristic element, but that which distinguishes him from them. Even if we admit the physical basis, and resolve all virtue into health of body '_la façon que notre sang circule_,' still on merely physical grounds we must come back to ideas. Mind and reason and duty and conscience, under these or other names, are always reappearing. There cannot be health of body without health of mind; nor health of mind without the sense of duty and the love of truth (cp. Charm. 156 D, E).