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So, what relaxes human beings? Paramahamsaji has given the message of yoga. He gave the message that yoga is the only technique in the world, the greatest technique in the world, in which relaxation can be obtained in twenty minutes. The changes that result are absolutely wonderful. There is no medicine in the world, there is no drug, there is no other technique in the whole world known to science, known to humanity, which can do this. It is false to claim that anyone can relax on pills or alcohol.
So, I have proved in this experiment what Paramahamsaji preaches, that it is possible to attain mental tranquility through yoga. The relaxation which you get in the brain pattern is called in yoga chitta vritti nirodhan. Books speak of the potential of yoga to change the patterns of the brain, but with Paramahamsaji's blessings, when I worked in London, it was proved for the first time in the world that it is possible to change the tendencies created in the mind and the patterns of the brain activity through yoga. This can be accomplished within twenty minutes. I shall now illustrate this with an experiment that I conducted with yoga nidra in London. I did an experiment on yoga nidra with 39 teachers of yoga, some inexperienced persons and some control persons. The experiment was carried out in Charing Cross Medical School, London. I shall tell you the average results that I obtained, and show you how, through yoga nidra only, it is possible in real terms to attain mental tranquility. It is only yoga that can give you complete and total relaxation, nothing else. I will show you how the sequence of changes takes place during the process of yoga nidra that was revised by our Paramahamsa Satyananda. He modified the tantric kriya called nyasa into the form of yoga nidra which we use today. This is one of the great achievements of Paramahamsa Satyananda. He developed many tantric kriyas into relaxation and meditative processes which anybody can practise, and thereby enjoy all the benefits of yoga and tantra.
In my slides of brain maps generated during yoga nidra you can see how this change can be achieved in the mind. The patterns of brain activity change, the patterns of the brain of an excited person showing red, yellow and green colors start changing as the person calms down. The moment yoga nidra is started, the patterns of the brain's activities start changing. The hyperactive colors start disappearing. This shows that the
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