Who Am I?

[Erock]

I scribble this question again and again    I believe that it's intention that you are "scribbling", the questioning is covered throughout the poem.
in my diary, blunt pencil and a fistful of doubt,
hoping to find a mirror in a bed of words.

I long to be a signature, but morph into a sponge,
crouching in the shadows of others, 
for a drop of greatness.
Give me your metaphors that glow like comets,
lighting up an audience.
Throw me a word of praise I can wear like an epithet.

I am a castle of dreams, slave to failure,    Slave to failure detracts from the following line, possible removal?
a believer in ladders to zeniths from rock bottom.
Every so often, a broken rung scrapes against my skin,
sands the edges of a person still forming,
and the conundrum in my heart grows,
in search of a word, an adjective
for those growing blank spaces.

Perhaps, when I've collected enough words,
I would be everything.

Just a couple of suggestions, good read, understandable and relatable.  Thank you.

EDIT.  I feel like a hypocrite.  These are your thoughts, written in a flow of mind that made sense to you as you wrote it.  BEAUTIFUL!  Ignore my couch ridden suggestions.  I understood everything you said and felt the meaning.  Don't let anyone criticize your unique flow.  Write, write and write.  Noone is superior to your thoughts or how they come to you.  All you holier than thou, star ridden experts, shame on you.  Do you feel better, I've read your heavy lyrical dribble on this page.  " An intellectual says a simple thing in a hard way.  An artist says a hard thing in a simple way"  Bukowski