12 September 1979, Haifa Yoga has become a very popular word throughout the world. We should know what Yoga is or rather, what the spirit of Yoga is. Human existence or human expressions are trifarious. Human beings have got a physical body and they have got physical problems, and they have to be solved. Secondly, human beings have got an intellectual structure, a mind, a psychic body, and all their psychic problems must be solved. There are so many knotty and complicated psychic problems, and when those psychic problems are not solved properly, people may become insane. There is a constant rise in cases of insanity throughout the world. This shows that the human problems, the psychic problems of human beings are not being properly solved. And, there is the spiritual body of human beings, their spiritual life. The culminating point of all spiritual progress is Parama Puruśa, the Supreme Entity, the Supreme Cosmological Lord. Now, what is Yoga? We must have Yoga in all the three strata of life. If there is Yoga only in the spiritual stratum and there is no Yoga in the psychic and physical strata, what will happen? The very existence of human beings will become unbalanced, human equipoise will be lost. So we must have Yoga, or rather Yoga-oriented movement, in each and every sphere of life. The crudest portion of human existence is the physical body. Now, what is this physical body? For human beings there is the external physical body and there is the inner projection of the physical body in the mind. You see an elephant in the external physical world, and you see the projection, that is, the extro-internal projection of that elephant in your mind. But for the creating Entity, for the Causal Matrix, there is no external world, so there is no physical world. For Him there is a psychic world and a spiritual world. But, for human beings there are three worlds – physical, psychic and spiritual. So, for us, our physical world is nothing but an ectoplasmic world of the Creator. While doing any work, while being engaged in any action we should remember the fact that whatever we see, whatever we do, is within the ectoplasmic scope of the Creator. This will be our Yoga in the physical sphere. Suppose, there is a drop of water in an ocean. When the drop feels its unity with the ocean, the drop no longer remains as a drop, it becomes the ocean. But when it feels its separation from the ocean, it is nothing but a drop of water. So, when a human being feels his/her unity with the Supreme Lord and feels that he/she is not an ordinary person, but the blessed child of the Supreme Father and when becomes one with him, then he/she is no longer an ordinary person. He/she acquires immense power, immense vitality, infinite vitality and this is your Yoga in the physical sphere. You should always remember that a man or a woman is an ordinary person when separated from the Supreme Father, but he/she becomes Supreme when one with the Supreme. This we do with the help of our Guru Mantra. This is Yoga in the physical sphere. In the psychic sphere, human mind is a projection of Cosmic mind. The so called physical body of human beings is nothing but the ectoplasmic creation of the Supreme. When this physical body, due to internal clashes and cohesions, gets powdered down, it is human mind, it is unit mind, and for this unit mind there are two worlds – internal and external. We become associated with the external world when there is an intro-external projection or an intro-external emanation. In the intellectual field, what is Yoga? "Yogashcittavrtti nirodhah." In the field of intellectuality, Yoga is Cittavrittinirodhah or "Sarvacintá parityágo nishcinto yoga ucyate." What is Cittavrttinirodhah? We should know. Just now I explained to you Yoga in the physical sphere and now I will explain Yoga in the intellectual sphere. In the human mind there are 50 propensities controlling 20 directional movements or propensities. So in all, there are 50 x 20. How many? 50 x 20 = 1000. So human expressions – human intellectual or human psychic expressions are 1000 in number. Those 1000 propensities are controlled by the pineal gland in the human body. This controlling point lies in the unconscious stratum of human mind and these 1000 expressions are there both in cerebral and non-cerebral or rather extra-cerebral memory. These propensities are there both in cerebral and extra-cerebral memory. If I get time I will explain to you what are cerebral and extra-cerebral memories. Now, when one withdraws particular propensity or all the 1000 propensities and goads those collectively withdrawn propensities unto Parama Puruśa, that is, when all those withdrawn propensities and the collective force of those propensities are guided and goaded unto the Supreme Entity, it is Yoga in the intellectual sphere, Yoga in the psychic sphere. It is called Jiṋána Yoga in Saḿskrta, and the former one is called Karma Yoga in Saḿskrta.