Caesar's mind has changed over the course of this scene. Has his tone or self-image shifted at all? How do you know? What might the shift (or lack thereof) indicate about Caesar's character?

this is the passage:

"the reader may remember, that when i signed those articles upon which i recovered my liberty, there were some which i disliked, upon account of their being too servile; neither could anything but an extreme necessity have forced me to submit. but being now a nardac of the highest rank in that empire, such offices were looked upon as below my dignity, and the emperor (to do him justice), never once mentioned them to me. however, it was not long before i had an opportunity of doing his majesty, at least as i then thought, a most signal service. "