Nirvikalpa

Samadhi is of two types: savikalpa and Nirvikalpa. In savikalpa, the thriputi or the threefold nature of knower, knowing, and knowee will persist. When it is realized that the knower is Brahman, knowing too is Brahman, and the thing to be known is also Brahman, then there is no more vikalpa or agitation or activity, that is Nirvikalpa samadhi.

Prashanthi Vahini, p.76

Nirvikalpa means arresting the activity of all the senses and assuming supreme control over them. Then the consciousness is not lost in the body, or in any part of the body, but it is entirely devoted to that higher or transcendental state.

Summer Showers 1972, p.252

For one who desires to attain the divine heights of the Supreme Being, karma (action) and wisdom are like the two wings of a bird. Many jnanis (seekers of wisdom) put a stop to their actions thinking that they have reached the highest state. In the state of Nirvikalpa samadhi, it is not possible to do anything. This may be described as the natural state of vairagya (detachment). But some people feel proud of their wisdom and discard all activity. This kind of vairagya proceeds from sloth, thamas, and is the result of vanity. This pseudo-detachment born out of indolence can never be traced to wisdom.

“In fact, the wise never desist from action, in order to set a model for others. If the wise do not act, there will be none to guide the ignorant,” Krishna observed.

Summer Showers 1979, p. 49

As the fruition of all sadhana (spiritual discipline), one is established in the perfect equanimity of unruffled consciousness (Nirvikalpa samadhi) and the ananda (bliss) that fills him is indescribable. It is ambrosial, equal to the nectar of immortality. Nirvikalpa means the state of consciousness when it is devoid of thought. This state can be reached through appropriate sadhana. It is of two natures: non-dual in full experience and the state of non-duality when dual thought ends. The first takes man beyond the triune of knower, the known and knowledge, and he is aware only of the cosmic intelligence or Brahman. The second stage is reached when all the attributes ascribed to God and man merge in the One, which embraces the cosmos and all its contents.

Vidya Vahini, p. 53