Yoga Sutras of Patanjali translated by Yogi Kalinath - Chapter 1, Verse 44
Pada 1, Sutra 44
Etayaiva savicara nirvicara ca suksma-visaya vyakhyata
When the object held in consciousness is subtle, cognitive absorption is still classified as either with or without deliberation.
Whether the object of our concentrative contemplation is on a tangible object (e.g. an actual Murthi) or a subtle object (e.g. a spiritual quality such as Compassion), Samadhi or cognitive absorption is still qualified as either i) with reflection/deliberation, where our awareness of the object is mixed with awareness of name, quality and knowledge (this is called Savichara Samadhi and is considered to be a lower kind of Samadhi), or as ii) without reflection/deliberation, where our awareness of the object is unmixed. This is called Nirvichara Samadhi and is considered to be a higher kind of Samadhi. Only in Nirvichara Samadhi can true Anandam (Bliss) and knowledge of the True Self Within arise.