This is shown by the way in which men train themselves for any kind of contest or performance: they practise continually.

Not to know, then, that repeated acts of this or that kind produce a corresponding character or habit, shows an utter want of sense.

Moreover, it is absurd to say that he who acts unjustly does not wish to be unjust, or that he who behaves profligately does not wish to be profligate.