This poem speaks to me Sinister. It reminds me of that last trace of the voice of public reason in my head I killed that time ago. The last thing to tell me of my limitations after I even stopped listening to my own voice of reason.

It also seems to speak of other things such as the people you know who may try to bring you down. Or that's something I got out of it. The repetition of 'You Can't' seems to reinforce this for me. It's a good poem.
Keep writing.