Chapter (অধ্যায়): THE FIRST STEPS PAGE-139Page: 139 of 521
to perform, according to certain schools, a practice called the purifying of the nerves. This part has been rejected by some as not belonging to Raja- Yoga, but as so great an authority as the commentator Shankaracharya advises it, I think fit that it should be mentioned, and I will quote his own directions from his commentary on the Shvethashvatara Upanishad: "The mind whose dross has been cleared away by Pranayama, becomes fixed in Brahman; therefore Pranayama is declared. First the nerves are to be purified, then comes the power to practise Pranayama. Stopping the right nostril with the thumb, through the left nostril fill in air, according to capacity; then, without any interval, throw the air out through the right nostril, closing the left one. Again inhaling through the right nostril eject through the left, according to capacity; practising this three or five times at four hours of the day, before dawn, during midday, in the evening, and at midnight, in fifteen days or a month purity of the nerves is attained; then begins Pranayama."
Practice is absolutely necessary. You may sit down and listen to me by the hour every day, but if you do not practise, you will not get one step further. It all depends on practice. We never understand these things until we experience them. We will have to see and feel them for ourselves. Simply listening to explanations and theories will not do. There are several obstructions to practice. The first obstruction is an unhealthy body: if the body is not in a fit state, the practice will be obstructed. Therefore we have to keep the body in good health; we have to take care of what we eat and drink, and what we do. Always use a mental effort, what is usually called "Christian Science," to keep the body strong. That is all--nothing further of the body. We must not forget that health is only a means to an end. If health were the end, we would be like animals; animals rarely become unhealthy.