Knowledge is experience of self
Without that experience there is only an imagination of what the self is like Or of what the atman is like
The mind must be pure otherwise there will be only imagination and no experience
A pure mind has no imagination.
A mind can be made pure only by shakti
Shakti can only be awakened by a Guru
A true Guru is very rare
Full awakening of all 3 ( or more layers of shakti ) can only be done by a Guru
Guru who claim awakening are fake. It is not advertised and not done en masse
The techniques are kept secret. It is not just saying words or mantra or touch etc
Good luck. Hope you can understand
Bhavin