Practice right conduct, learning and teaching;
Be truthful always, learning and teaching;
Master the passions, learning and teaching;
Control the senses, learning and teaching;
Strive for peace always, learning and teaching;
Rouse kundalini, learning and teaching;
Serve humanity, learning and teaching;

I like this passage because it emphasizes that we not only need to learn proper spiritual behavior ourselves, but we also need to teach it to others.
Kundalini is energy that sits at the base of the spine and the function of yoga is to get it moving up toward the head.