Dr. Faustus Interpretation of End of Scene One

To me it sounds like Faustus, with the help of Valdes and Cornelius, is planning on taking over the world.  They are planning to make everyone their personal slaves and defenders.  Cornelius tells Faustus that he can focus on nothing but this magic.  Then Faustus invites Valdes and Cornelius to eat with him and after he will learn the magic.  I think that Faustus will learn magic and preform it but it will back fire on him.