Charles Dickens

this poem is for a contest. its supposed to be about Charles Dickens. i wanted to post it here before i submitted it anywhere. please do leave a review as i am in big need of it!
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You became my eternal guide
When I first learnt to word my thoughts.
Under your grace I learnt,
How and how not to write.
          Oh, my invisible teacher,
          You became my master
         Telling me always to
          Write and write.
I gained more and more
As I read your words
Through ages- upheld
Celebrated and stored
         You, my sir,
         Fought through your books,
         Against evil and society;
         Teaching me all the way to voice my hurt and anger too...
Oh dear maestro,
You taught me everything,
From the essence of Christmas to
Having great expectations.
          You continue to be there
         to rectify me, to refine what I do.
        I thank you sir,
        For being my greatest teacher.