undesirable. Leaving something incomplete
makes it intersting, and gives one the feeling that
there is room for growth......
Even when building the imperial
palace, they always leave one
palace unfinished."
Japanese Essays in Idleness
14th Century.
Great talk on Symmetry on TedTalks YouTube Channel - link is below
http://www.youtube.com/watch?v=415VX3QX4cU