"What is more important, the sun or the moon?" asked one day the students of Nasreddin Hodja, the famous hero of Turkish folk tales. "Well, of course the moon," Nasreddin Hodja replied. "Because what does the sun do during the day? ... While the moon, if it wasn't there, how would we see the night?" Teacher Omraam Mikhael Aivanhov often tells this joke because, in reality, Nasreddin Hodja's reasoning is exactly that of most people who have never realized that the sun, the center of our planetary system, is of fundamental importance for our future and evolution. He says: <>. For scientists: astronomers, physicists, biologists, doctors, all the revelations that Teacher Omraam Mikhael Aivanhov brings with this new heliocentric perspective open up a field of incredible possibilities... in the moral, religious area, the reader will be amazed by all the spiritual exercises presented to him as a new yoga: "Surya yoga," the yoga of the sun...