At the beginning of the story we can some what be fooled that Cassius and Caesar are friends. But once Caesar had taken the thrown Cassius had become jealous. Jealousy can then bring of the most true qualities of a person. The quote above portrays a characteristic of Cassius; someone who uses the people around him to get what he desires. Cassius's is not only jealous, but brilliant as well. Devising plans that can trick some one of the most respected men in Rome, Brutus.
Cassius can be known as the king of manipulation. Cassius had used his devious skills of manipulation to convince Brutus to join the conspirators in murdering Caesar.