Doubt…at some time or another it hits us all. Doubt in our abilities, doubt in the meaning and value of our endeavors. People who work creatively often wrestle with this, and it doesn’t necessarily end with “success.” These negative thoughts can really get you down and lead to a serious loss of productivity.
How should you deal with it? Know that it is only temporary. Think about those times when your confidence soars. And have faith that what your doing is meaningful. Have faith in yourself and your work. Change the subject in the negative conversation you are having with your inner voice. Lead that conversation back to making progress in your creative work. Finally, just get back to doing that work. The clarity of your purpose will return soon enough.
Jay Lake has written a very honest post looking at this issue head-on: Blind faith and the working writer.