Shravanna,  manan, niridhyasana.

I shall now tell you the scheme of liberation.

One learns true devotion to God after a meritorious life continued in several births, and then worships Him for a long time with intense devotion.
Dispassion for the pleasures of life arises in a devotee who gradually begins to long for knowledge of the truth and becomes absorbed in the search for it.
He then finds his gracious Master and learns from him all about the transcendental state. He has now gained theoretical knowledge.
[Note: This is Sravana.]

After this he is impelled to revolve the whole matter in his mind until he is satisfied from his own practical knowledge with the harmony of the scriptural injunctions and the teachings of his Master. He is able to ascertain the highest truth with clearness and certitude.
[Note: This is Manana.]

The ascertained knowledge of the Oneness of
the Self must afterwards be brought into practice, even forcibly if necessary, until the experience of the truth occurs to him.
[Note: This is Nidhidhyasana.]

After experiencing the Inner Self, he will be able to identify the Self with the Supreme and thus destroy the root of ignorance. There is no doubt of it.
The inner Self is realised in advanced
contemplation and that state of realisation is called nirvikalpa samadhi.

Memory of that realisation enables one to identify the Inner Self with the Universal Self (as ‘I am That’).
[Note: This is pratyabhijna jnana.]

– Tripura Rahasya. Chapter XVII. (63-69).