There are a few ways to view writing and the composition of writing within and, by intimate association, inspiration. Chief among the defining is how to term its creation and placement. One is to term it is a blank slate, where it is all new, nothing to taint the total picture and message within. The second school would be to see it all connected, as life is, with what comes from before it and the influences of the writer. Both are correct in many respects.
First, inspiration isn't simply out of the blue. It is out a multicolored experience that we reach a moment of "Aha!" Secondly, there isn't a time that something else from our past that colors our display, our words, our choices. Life is colored in the past, but the future isn't the past.
Yet, there is something to be said about a "fresh" view. Yet, that view must come from something before it, and if so... purified to its essence, a message required to be proclaimed. Inspiration must be tested but not denied. A gift must be identified before it is known how to be used. So too must inspiration be handled.