"What is more important, the sun or the moon?" asked Nasreddin Hodja's students one day, the well-known hero of Turkish folk tales. "Well, of course, the moon," replied Nasreddin Hodja. "Because what does the sun do when it is day? ...While the moon, if it weren't there, how would we see at night?" Master Omraam Mikhaël Aïvanhov often tells this anecdote 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 for our evolution. He says: >. For scientists: astronomers, physicists, biologists, doctors, all the revelations that Master Omraam Mikhaël Aïvanhov brings with this new heliocentric view open up a field of incredible possibilities... in the moral, religious field, the reader will be amazed by all the spiritual exercises presented to him as a new yoga: "Surya - yoga," the yoga of the sun...