You may hear of people who have done Yoga and did not like it and prefer another, more athletic activity, such as running or tennis. However, when was the last time you heard someone say, "I do not like Yoga because it encourages and inspires negative thoughts, emotions, and feelings." The answer is probably never, because Yoga strives to inspire the opposite reaction.
Teaching any style of Yoga is akin to practicing Jnana Yoga, (Union through knowledge), even if you are a Hatha Yoga teacher. How can I state this? Yoga knowledge is infinite and the pursuit of Yogic knowledge is a daily task. Continuing education is an integral part of every Yoga teacher's life.