Although this Shakespeare's play revolves around the thoughts and deeds of Brutus. The ghost of Caesar appears before Brutus so as to remind the audience and universal history that Caesar was an institution. Cassius admits this significant lesson when he says: "O Julius Caesar, thou art mighty yet. / Thy spirit walks abroad and turns our swords / In our own proper entrails." The body of Caesar has been slain, however, his myth and his spirit are alive.