Answer: 1. Brutus thinks power will change Caesar. 2. He thinks that the people of Rome desire to finish him as well because of a letter that he receives.
Explanation: Brutus claims not to have any reason to finish Caesar off. However, he discreetly implies "reasonable" facts that would make it a good idea. He presumes that, although Caesar hasn't portrayed ambitious behaviors, power could corrupt his mind. Furthermore, due to a letter he receives in which he is accused of sleeping in Rome's reign, he assumes that the people from Rome wants Caesar's life to end as well.
It's important to try to empathize with others because by being able to understand their thoughts and feelings from a personal experience allows better communication and a better relationship with them.