I think overall the majority of people who are practicing it as a subject are following the right line. For the aberration, don't blame yoga or the whole community of yogis

True concentration is an unbroken thread of awareness.

Yoga is the music of the soul. So do continue, and the gates of the soul will open.

Intellectuals tend to be arrogant. Intelligence, like money, is a good servant but a bad master. When practicing pranayama, the yogi [makes] himself humble and without pride in his intellectual attainments.

As the trunk is one but the branches are many, yoga is one but adaptations may vary.

By drawing our senses of perception inward, we are able to experience the control, silence, and quietness of the mind.

Backbends are not poses meant for expressionism. Backbends are meant to understand the back parts of our bodies. The front body can be seen with the eyes, but the back body can only be felt. That's why I say these are the most advanced postures, where the mind begins to look at the back.