The creativity kicks in when you display your individual method to express that feeling.
It then moves to the expressive stage, getting that feeling "out there" by producing a piece of work that you cannot stop or delay until all those feelings are expressed in a way that makes you feel satisfied.
It needs concentration and pushing your boundaries of thought and method. But once its out there it is a huge relief. The feeling of accomplishment when it is completed they exact way you intended it to.
As long as it stirs some sort of emotion that starts the entire process off again.
Yesterday, I watched It Might Get Loud which is a documentary movie about three awesome guitarists: Jimmy Page from Led Zepplin, Jack White from The White Stripes and The Edge from U2. This made me think of the creative process and how it manifests...
Its a great film. Go watch!