The description of his blood being "cold" in the quotation above clearly shows that the ghost does make Brutus feel afraid and worried. However, throughout his meeting with the ghost and how the spirit assures him that they will meet again at Philippi, Brutus appears to...
So it appears that Brutus was terrified when he saw Caesar's ghost (his blood ran cold and his hair stood up on end). But once the ghost has gone, Brutus calms down, claiming that he would have talked to him more if he had stayed longer. This shows that Brutus is not really afraid of the dead body itself, but rather he is afraid of what might happen after his death.
In addition, it shows that people can change over time. It also shows that even though Brutus was one of the first people who killed Caesar, he could have changed his mind later on. Maybe he could have lived happily ever after with Antony instead of going ahead with the assassination. However, this book doesn't tell us what happens afterwards so we can't know for sure.
How does Brutus respond to the Ghost of Caesar based on what he says afterwards? He is afraid for his life and is unsure what to do next. He is remarkably unaffected and peaceful. He is in denial and claims he saw nothing.
These are just some examples of how one can interpret Brutus' lines during the scene. They are not definitive interpretations, but they should help you understand more about this key moment in history.
So when Caesar's ghost, who refers to himself as "thy terrible spirit," informs Brutus that he will see him again in Philippi, it's very apparent that he's forecasting his death. The ghost is a representation of his remorse and his rising fear that his wicked acts would come back to haunt him. It also warns him that even after he dies, his legacy will live on forever through his children.
It's interesting to note that while Brutus was willing to kill Caesar to save Rome, in the end he failed because there were not enough people out to oppose him. If anyone else had been in charge instead of Caesar, they would have done the same thing and saved Rome too. This shows that no one person can bring about great change alone, it takes everyone working together for the good of everyone else.
After Brutus hears from his ghostly visitor that he will see him again in Philippi, he goes to Antony immediately to tell him what has happened. But before he can get a word out, Antony bursts into tears and tells him that he too has seen Caesar's ghost. Then they both go to Marcia to tell her that Caesar has died.
This passage shows that Brutus knew exactly what kind of man Caesar was and that he could not be trusted. Even though many people believed him to be good, he was still guilty of murdering Julius Caesar.
What does Brutus witness on the battlefield that makes him want to commit suicide? Caesar's spirit. If Caesar can be so bold as to insult the gods, then anything is possible, including being spared by them.
Brutus believes that if Caesar is willing to put himself forward as a candidate for king, then he must be able to face any danger to which he might be exposed. Therefore, it is only right that someone should take action to protect him. However, since this person is now Caesar, it would not be appropriate for another to kill him. Thus, Brutus comes up with a plan to assassinate him.
Brutus knows that there are many people in Rome who love Caesar too much to allow him to be killed, which is why he decides that before he commits suicide he will first order some of his friends to do so. Then, after they have killed themselves, he will follow their example. This way, any danger that might be threatening Caesar will also threaten Brutus, and everyone will think that he or she was responsible for his or her own death.
It was Caesar's ghost's function as an apparition to awaken Brutus' conscience once he saw it. He is aware that it is current to make a forecast regarding future horrible events that a tyrant may perform. Brutus will start to reflect about his previous actions as well as what can happen to him in a future conflict. So, Caesar's ghost will be able to inspire in him new ideas and prepare him for upcoming challenges.