Even enlightened beings – when they write books – they veil many secrets. Even the things they write , they write it in a slanted way – that is by hiding the real meaning
If you put all the books together and sum up the knowledge it is less than one percent of the wisdom from an enlightened person.
Yoga is about direct perception. It has nothing to do with intellectual understanding. What is the point of saying shivohum or sohum or I am the soul when you have never freely experienced yourself repeatedly as pure consciousness – without the body ?!
The greatest progress can be achieved only if you truly want the experience, not want anything in the world and you have a true Guru
The sign of a true Guru – one with experience – he can give a yogic interpretation of anything in the scriptures – something NEVER written before