When one traces the origin of medicine, which has developed into the pure science it is today, one will find that its source was in intuition. It is the mystics who have given it to the world. For instance Avicenna, the great Persian mystic, has contributed more to medicine than any other man in the world history of medicine. We know the meaning of science to be a clear knowledge based on reason and logic; but at the same time, where did it start? Was it by reason and logic? First there was intuition, then came reason, and finally logic was applied to it. Furthermore, in the lower creation there are no doctors, yet the creatures are their own physicians. The animals know whether they will best be cured by standing in the sun, by bathing in a pool of water, by running in the free air, or by sitting quietly under the shade of a tree.