I agree with Cyberstretch in that there are many varied reasons for art. I would also say that one manifesto cannot encompas the intentions and drives of all artists. For some it may be soley creations of their own ego that drive them to produce, but even so, it does not de-value the end product....art. It is not the motives of the artist that make up art, but more so the experience of the viewer. If art can move a person in any way, then it is alive and has found its soul. Perhaps this may be a good personal manifesto for you and your path in art, and as such you have found your purpose.