Can I be great during a slump?

I am in a major slump. Not able to generate any enthusiasm. Feeling totally overwhelmed and like everything depends on everything else. So I am forcing myself to just take the next action, even though I don't feel like it. That is the definition of greatness: Doing what I said I would do, whether I feel like it or not. What commitment are you not keeping because you don't feel like it. Will you do it anyway?