I like what it says about yoga being a living and practical science:
“Yoga has always been a living Science in the East and it has had an unbroken succession of living experts who continually verify by their own experiments and experiences the basic truths of this Science… It is only when a Science is divorced completely from its practical application that it tends to lose itself in a morass of words which have lost their meaning and relation with the actual facts.”
Several times in the past week Richard Freeman has mentioned the importance of experimentation, play, and avoiding orthodoxy (Ashtangis have a tendency towards orthodoxy!):
"You should be experimenting. If you are too orthodox, you can’t experiment... Play in the pose."