What are the important questions we should be asking ourselves according to Plato and Aristotle? Describe Plato's arguments against Thrasymachus's belief in ethical egoism (the theory of might makes right or self-interest = your only duty is to yourself) base on Plato's arguments from external and internal corruption (the most important part of Plato's theory). What are the basic elements of Aristotle's ethics and how is it a profound guide to life?