Still, through this fallacious medium, a real enlargement of ideas is attained. When the virtues as yet presented no distinct conception to the mind, a great advance was made by the comparison of them with the arts; for virtue is partly art, and has an outward form as well as an inward principle. The harmony of music affords a lively image of the harmonies of the world and of human life, and may be regarded as a splendid illustration which was naturally mistaken for a real analogy. In the same way the identification of ethics with politics has a tendency to give definiteness to ethics, and also to elevate and ennoble men’s notions of the aims of government and of the duties of citizens; for ethics from one point of view may be conceived as an idealized law and politics; and politics, as ethics reduced to the conditions of human society. There have been evils which have arisen out of the attempt to identify them, and this has led to the separation or antagonism of them, which has been introduced by modern political writers. But we may likewise feel that something has been lost in their separation, and that the ancient philosophers who estimated the moral and intellectual wellbeing of mankind first, and the wealth of nations and individuals second, may have a salutary influence on the speculations of modern times. Many political maxims originate in a reaction against an opposite error; and when the errors against which they were directed have passed away, they in turn become errors.