Mysticism is the essence and the basis of all knowledge, science, art, philosophy, religion and literature. These all come under the heading of mysticism. 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. I once knew a sensible dog who used to fast every Thursday. No doubt many people of the east would say he was an incarnation of a Brahmin; but to me, it was a puzzle how the dog knew it was Thursday! People think a mystic means a dreamer, an impractical person who has no knowledge of worldly affairs. But such a mystic I would call only half a mystic. A mystic, in the full sense of the word, must have balance. He must be as wise in worldly matters as in spiritual things. People have had many misconceptions of what a mystic is. They have called a fortune-teller a mystic, or a medium, a clairvoyant, a visionary. I do not mean that a mystic does not possess all of these qualities, but these qualities do not make a mystic. A real mystic should prove to be an inspired artist, a wonderful scientist, an influential statesman. He should be just as qualified for business, industry, social and political life as is the materially minded man. When people say to me, 'You are a mystic, I thought you would take no notice of this or that,' I do not like it. Why should I not take notice of it? I take notice of every little detail, although every little detail does not occupy my mind so much that I take notice of nothing else. It is not necessary to be unconscious of the world while being conscious of God. With our two eyes we see one vision; so we should see both aspects, God and the world, as a clear vision at the same time. It is difficult, but not impossible.