Patanjali's yoga sutras

From further purification of nirvichara samadhi (meditation that transcends the realm of thought altogether) spiritual illumination ensues.

nirvicāra = nir + vicāra

• nir without
• vicāra thinking; inner reflection; analysis; contemplation

Together, nirvicāra refers to the state of samadhi that transcends the realm of thinking; the samadhi devoid of the thought process.

vaiśāradye locative of vaisharadya. Upon purification, transparency; upon infusing it with sattvic qualities; upon filling it with pure virtues or the virtue of purity 

adhyātma spiritual; seated in spirit; having the soul at its core 

prasādaḥ illumination; enlightenment; happiness; joy; transparency

The outcome of Nirvicara is Adhyatmaprasad, i.e. the most blissful state, a state where the mind is absolutely soft, pure, unaffected by anything, no thoughts at all. 

Google translate: Spiritual grace in the mastery of thoughtlessness

“The Blessed Lord replied: Brahman is the Indestructible and Supreme Spirit. Adhyatma is Brahman’s manifestation as the essential soul of all beings”. Bhagavad Gita 8:3 (1)