Again, moral virtue seems, in some points, to be actually a result of physical constitution, and in many points to be closely connected with the passions.

Again, prudence is inseparably joined to moral virtue, and moral virtue to prudence, since the moral virtues determine the principles of prudence, 255 while prudence determines what is right in morals.

But the moral virtues, being bound up with the passions, must belong to our compound nature; and the virtues of the compound nature are emphatically human. Therefore the life which manifests them, and the happiness which consists in this, must be emphatically human.

But the happiness which consists in the exercise of the reason is separate from the lower nature. (So much we may be allowed to assert about it: a detailed discussion is beyond our present purpose.)