Word from Peter

Not sure at all how it fits but thought I should write it down as I keep being reminded.  It may be a particular word for me.
 
I believe God says:
 
'I have made each of you a unique instrument, beautifully and perfectly made.  You are designed to play a particular tune that I need.  Your task is to be available to allow me to play that tune when I need it.'
 
The challenge is are we available or are we using our instrument to play some other tune most of the time and not there when God needs us to play our part in making the music of heaven that he wants to create.