Edward Winkleman uses this diagram as a metaphor to explain how most artists' journeys and interests would look if charted - it would not be as a straight line, but as a sprial indidcating how artists "...[return] to the same ideas again and again, only with more insight/experience than the last [previous] time."
Full article: http://edwardwinkleman.blogspot.com/2008/06/tuesdays-aside-shifting-gears-trust.html
Edward Winkleman is an arts dealer who blogs about art and politics, including many issues of particular concern to artists. A few posts from the past couple of months include:
By What Measures is a Picture "Considered Good"?
Invitation Greening Pros and Cons about a trend of galleries replacing post card exhibition announcements with email and the ramifications this has for artists
The End of an Artist-Gallery Relationship, from Both Sides
To check out Edward Winkleman's blog in full:
Winkleman Gallery website: http://www.winkleman.com/