Zen Kundan, I think you have just highlighted the importance of "akagra dhyaan" to see what is beyond the optical illusion. Fix your gaze, do not twitch even a single muscle in your body, especially your eyes....the view is much more different. -------- This is such a wonderful discussion topic, illuminating in many respects. I will be bouncing off my views on the topic soon as soon as I get respite from my daily responsibilites. -------