How, according to vergerius, do history, moral philosophy, and eloquence complement each other?

According to Vergerius the moral philosophy gives us an insight into the secret of the true freedom while history gives us the examples of what is said by philosophy, it teaches us lessons on what not to repeat and gives us examples of how we can overcome certain problems. Eloquence in turn helps us show the truth of philosophy to other people.

answer; degradation ceremony;

answer; their own memory abilities;