An effort in creative undoing of the false indivi-dualistic self in order to get established as the true non-dualistic Self which is Satyam-Gnanam-Anantam Brahma(n). This is Moksha, Enlightenment or Self-Realization.
If you are truly awakened to your real nature or swarupa, then you cannot stop anywhere in between till your mind is completely dissolved (manonasa, vasanakshaya). The mind came into being only because of ignorance and so till the momentum of ignorance completely dies down, you cannot settle in your swarupa or to be more precise, settle as your swarupa. Of course, the dissolution of the mind is the most difficult thing but arguing that it is not needed means that you are not truly awakened! This justification happens mainly when your intellectual layer is not awakened to the Truth. But once your intellect is fully convinced of non-duality, then you cannot stop anywhere till non-dual consciousness becomes your sahaja.
PS: Truth or swarupa is not feeling alone. It is ever-present insight and perfect understanding. Only when the insight and perfect understanding shine constantly, the mind as duality cannot survive.
When you have understood that Pure Consciousness is your real nature, then practice the following samadhis 24×7.
Savitarka with Witness Consciousness as object.
Nirvitarka with Witness Consciousness as object. When this is complete, the Witness Consciousness is awakened.
Savichara with Witness Consciousness as subject and thoughts/emotions/ideas as object.
Nirvichara with Witness Consciousness as subject and thoughts/emotions/ideas as object. When this is complete, the Witness Consciousness is established.
Sabija or Savikalpa with “I” momentum or all latent impressions as the object and Witness Consciousness as the subject.
Nirbija or Nirvikalpa with “I” momentum or all latent impressions as the object and Witness Consciousness as the subject. When this is complete, you are established as the Self or in Sahaja Samadhi and therefore free from samsara!
For further details about the types of samadhis mentioned above, refer to Patanjali Yoga Sutras 1.41 onwards.
PS: Pure Consciousness which you are truly, is free of vitarka, vichara and vikalpa. All these practices are only to take vitarka, vichara and vikalpa to their limits and finally give them up to fully recognize your real nature.