At a recent conference, the presenter noted that music is simply noise with rules applied. For me, it is noise with rules and with filters.
Do you filter the noise out from around you?
Ignore the noise that pulls you away from who you are and what you are about.
If you want to write a book and everyone is telling you how unlikely it is that you will get it published, or how few books become bestsellers, ignore the noise. Write your book.
If you are in a troubled relationship and everyone is telling you to let go, but you want to work on it, ignore the noise. Work on the relationship (barring abuse, that is).
If you want to run a marathon, but people are telling you how hard it is to train, ignore the noise. Start running (or walking)!
If you let all the noise in, you will never find your voice, and you will never write your music. Ignore the noise.