The description in your first paragraph is very nice! I can definitely see you cozying up with a book.
was enamored to a talk show-host's booming articulation
enamored by
I envisaged myself
envisioned myself
my appreciation for literature and communication has continued to heighten
either change "has continued" to just "continued", or make the verbs in the rest of the sentence present tense as well.
Interestingly enough, my fields of interest directly clash with those of my parents'. My father is a calculus professor and my mother is a microbiologist.
actually, their professions don't necessarily clash with your interest in words. Almost all professions require communication skills, whether through speaking or writing, and their jobs in math and science don't automatically mean they don't like language.
My lack of interest (and a correlating decline in performance, naturally)
ah, okay, this is a little iffy. You're trying to justify perhaps bad grades in math and science because you don't like the subject. However, to colleges, just because you're not as interested in something doesn't excuse a lack of hard work. I would take this out and simply focus on how you're passionate about other things, not how you
aren't passionate about this.
Also, besides the possibility of a double major, how will Cornell benefit you? I think they'd want to see some mention of specific programs or aspects of their college.