In this particular passage, Cassius is speaking to Brutus about his lack of what I believe is self-esteem. Cassius believes that Brutus cannot see himself as he really is. Cassius says:
And since you know you cannnot see yourself
So well as by reflection, I, your glass,
Will modestly discover to yourself
That of yourself which you yet know not of. (1.2.69-72)
This quotation at first caught my attention because of the usage of reflection, and the word glass. I believe that in this quotation, Cassius thinks that he can help Brutus see his true identity; Brutus has things that he does not know about himself that Cassius can clearly see. In this quotation, Cassius compares himself to a mirror.
I believe that this is an extremely powerful metaphor, but it raises some questions. The metaphor achieves its goal because the reader will be able to easily understand what Shakespeare is writing. Especially in today's society, we depend on mirrors to show us how we look. My only question in regards to this comparison is this: do mirrors truly convey who we are as a person? Cassius seems to indicate that indeed, mirrors reflect your deeper personality; after all, he knows things about Brutus that Brutus does not know about himself. But in my experience, while mirrors are great at showing you your appearance, your appearance is only one part of your self-image. I question as to whether mirrors can accurately portray who you are-how can a mirror reflect your passions and whether or not you are a nice person?
But before I get too sidetracked, as I reread this quotation, it reminded me of Sylvia Plath's poem "Mirror". In this poem, Sylvia expresses the idea that the mirror reflects the truth of who we are. She expresses this idea in the following lines:
..................I have no preconceptions.
Whatever I see, I swallow immediately.
Just as it is, unmisted by love or dislike,
I am not cruel, only truthful-- (1-4)
While Plath's poem seems to back up Cassius' statement that he reflects Brutus' personality accurately, by stating that the mirror reflects the image without distortion based on emotion, I still question whether a mirror can accurately be used to judge oneself. I also place this uncertainty on Cassius' remarks as well-can he accurately depict Brutus' personality? I guess time will tell.