First, however, the yogin had to undergo a long period of preparation. He was not allowed to perform a single yogic exercise until he had completed an extensive moral training. The aspirant began by observing the yamas (“prohibitions”). At the top of the list was ahimsa, “harmlessness.” The yogin must not kill or injure other creatures; he could not even swat a mosquito or speak unkindly to others. Second, he was forbidden to steal, which also meant that he could not grab whatever he wanted, whenever he wanted it; he must simply accept the food and clothing that he was given without demur,
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