...on with the Yoga Sutra...
so the next bit of the Yoga Sutra, sutra 1.23, states that one path to samadhi is the "surrender to the Universal Soul" or to the "teacher of the other teachers" (depending on which translation you're reading). Sutras 1.24-1.26 describe the characteristics of this ultimate teacher and 1.27 & 1.28 describe how one might go about making that connection.
...and this is the point where I acknowledge that this is pretty sticky stuff for anyone with NO scholarly background in Yoga Sutra studies (i.e. me) ...but in the interest of making my way through the Yoga Sutra and sharing that here, I'm throwing the summary text up there. You can all ponder it with me! :)
In my mind, the "teacher of the other teachers" is the practice itself. I think it is the practice itself that is everyone's ultimate teacher. I find the idea of setting aside control or "surrendering" in practice interesting. I definitely learn the most from practice when I'm open to surprises and when I'm willing to let the practice itself be the teacher rather than trying to control where it's going.