Nature cannot be inferior to Art. The Arts are but imitations of Nature. If this be so, that Nature which is the most perfect and comprehensive of all cannot be inferior to the best artistic skill. Now all Arts use inferior material for higher purposes; so also then does universal Nature. Hence the origin of justice, from which again the other virtues spring. Justice cannot be preserved if we are solicitous about things indifferent, if we are easily deceived, rash, and changeable.