Katha Upanishad 1:3:6:~ Neither by reading the book nor by taking a bath at a holy place has one become pure.+

If you letting go of everything then yourself still remains. Until you realize yourself is not the real Self but the Soul is the Real Self the freedom is not gained.

The Upanishads declare:~

Mundaka Upanishad 1:2:8:_ “Remaining in the fold of ignorance and thinking “we are extremely wise and learned,” the fools with boastful nature ramble about like the blind led by the blind alone.”

Mundaka Upanishad 3:2:3:- “The weak and timid cannot realize the Self. Self-Realization is not possible through intellect or hearing spiritual discourse. One who welcomes God in every activity, through a thorough controlled and disciplined life, to him also the Soul is revealed

The Upanishads declare:~

Katha Upanishad 1:2:23:~ The Soul cannot be realized through hearing a scholarly explanation of the discourses, not even by the intellect.

Katha Upanishad 1:3:6:~ “Through the knowledge of the Soul, God, one is pure and clean constantly.” Neither by reading the book nor by taking a bath at a holy place has one become pure. Inner purity is possible when one remains in constant touch with the Soul. Self-awareness is the real purity.

Kena Upanishad 2:4:~ When it is known through every state of cognition, it is rightly known, for (by such knowledge) one attains life eternal. Through one's own self one gains power and through wisdom, one gains immortality.

Kena Upanishad 2:5:~ If here one knows it, then there is truth, and if here one knows it not, there is a great loss. Hence, seeing the Real in all beings, wise men become immortal on departing from this world.

Scriptures are being added from time to time. This process will go on. There is the final authority among them? One contradicts the other: duality reigns supreme.

The Upanishads are self-contradictory. Every pundit even gives conflicting interpretations of them. The final authority, therefore, is using one’s own reason. One should apply his reason to them.

The scriptures are for ignorant masses, who wholly accept the material world as it presents itself. Gnana is for those who have begun to realize that things are not what they seem.:~Santthosh Kumaar