Losing my passion

Woke up this morning with a thought. What if i suddenly lost all of my passion to become a better artist? Would that be the time to call it quits?When turning up to the easle (computer these days) becomes a chore. Something that no longer makes me happy. When i get tired of a file full of sales receipts for art suppliers and one tiny manila folder with one or two sales receipts for art  with my name on it. Not to mention the file full of rejection slips from publishers. All this is fine if the 'doing' of the art still makes you happy! So this is the question I am sitting with for a while and I have a feeling I'm not sitting alone.