Religion is, in fact, a severely practical and empirical kind of research.
You take nothing on trust. You accept nothing but your own experience.
You go forward alone, step by step, like an explorer in a virgin
jungle, to see what you will find. All that Patanjali, or anybody
else, can do for you is to urge you to attempt the exploration
and to offer certain general hints and warnings which may be of help
to you on your way.
(p. 59)