"I will see thee at Philippi." -Julius Caesar, Act IV, Scene 3. You have to have seen the play to know the significance of this quote. Brutus sees Caesar's ghost in his tent. And, frightened, he asked when we he would see him again, meaning will he haunt him again. Caesar respond he will see him at the city of Philippi. Brutus misunderstands, thinking he'll see Caesar's ghost again there. Actually, Brutus was to die at Philippi. And then the two of them would be united again in friendship in the afterlife. Because all the other conspirators did what they did for fame and fortune. But Brutus alone did it for principle.
Yeah, Brutus alone did the evil deed for honor and principle. And so the play ends on that note, that Brutus was of noble spirit, not evil, but just the right mixture of "elements" that made him worthy of being reunited with his friend in the afterlife: “His life was gentle; and the elements So mixed in him, that Nature might stand up And say to all the world, This was a man!” -Act V, Scene 5.
BTW, as I said, Shakespeare meant, that unlike the other conspirators, perhaps Brutus had just the right "mix" of good and evil in him. Some people do you know. I have a theory that we are all multifaceted. And no one should just be judged by his or her worst mistake. I think Shakespeare was saying though that Brutus was more good than bad. But I still think it can relate to my personal moral theory. Also, you know some people think Mark Antony was talking about his friend Caesar at the end. But he was talking about Brutus. If you read the whole play, you see how it ties in with the Philippi quote.
Also, I had to add. Brutus alone did it for honor and the betterment of Rome. And, he also knew he'd be reunited with Caesar again in death. And he famously said at the end of the play, as he committed suicide while his loyal friend Strato held the sword, “Farewell, good Strato— Caesar, now be still. I killed not thee with half so good a will.” Then Mark Anthony upon hearing the news of this with the other generals at the very end of the play says “This was the noblest Roman of them all. All the conspirators save only he Did that they did in envy of great Caesar. He only, in a general honest thought And common good to all, made one of them.” Then Octavius speaks the final line of the play. He says Brutus will be accorded all the honors of a Roman nobleman. And also, perhaps fitting the antihero that he was too, he adds “According to his virtue let us use him, With all respect and rites of burial. Within my tent his bones tonight shall lie, Most like a soldier, ordered honorably. So call the field to rest, and let’s away, To part the glories of this happy day.”