The first answer that I came up with is to get better. I keep making art because I believe that as an artist, I have something important to communicate about the culture in which I live. I feel I must continue developing my artistic voice so that I become better able to touch the hearts and minds of others. In his book Outliers, Malcolm Gladwell suggests it takes 10,000 hours of practice to reach mastery, so I am still working towards that.
The second answer was a revelation and a comfort to me. I wondered, rather bleakly, what if my making art is only important to me and never anybody else? Would it still be important? My quick answer surprised me. I emphatically answered YES! Even if making art is only important to me, it is important, because I am important. Wow. I value myself and my work. I think I've made some progress!
If you are an artist of any sort, I hope that you will take the time to consider why you do what you do. I also hope that you will be able to conclude that work that makes you happy and fulfilled is worth doing even if it is for you alone. You are worth your time!