<human>:  I have a question about the first of the yamas in the Yoga Sutras. Who is the author of the Yoga Sutras?
<bot>: The Yoga Sutras are attributed to Patanjali, who lived in the second century BCE. The Yoga Sutras are a collection of aphorisms that describe the practice of yoga. The first yama is ahimsa, which means nonviolence. The second yama is satya, which means truthfulness. The third yama is asteya, which means nonstealing. The fourth yama is brahmacharya, which means celibacy. The fifth yama is aparigraha, which means nonattachment.