Virtue is excellence, something uncommonly great and beautiful, which rises far above what is vulgar and ordinary.
 Adam Smith, The Theory of Moral Sentiments (1759). copy citation

Context

“The great and exalted virtue of magnanimity undoubtedly demands much more than that degree of self-command, which the weakest of mortals is capable of exerting. As in the common degree of the intellectual qualities, there is no abilities; so in the common degree of the moral, there is no virtue. Virtue is excellence, something uncommonly great and beautiful, which rises far above what is vulgar and ordinary. The amiable virtues consist in that degree of sensibility which surprises by its exquisite and unexpected delicacy and tenderness. The awful and respectable, in that degree of self-command which astonishes by its amazing superiority over the most ungovernable passions of human nature.” source