Plato answers by claiming that morality is a necessary cause of happiness, that one's happiness is correlary to one's moral behavior. Therefore, an immoral person would be motivated to be moral if he wants to be happy. The happy person, according to Plato, is the just person, a claim that he posits in two ways:
Descartes goes on to say that he will try to prove not only that God exists, but that his existence is clearer and more certain than the existence of anything other than ourselves--that we |