(‘The word is ArSha or ārṣa. The meaning is given as “relating or belonging to or derived from RRiShi-s or ṛṣis-s”.)
D quotes…’Brihad. Up. 1.4, explaining how ṛṣi-s and devatā-s have got ‘extraordinary body-mind-complexes, which enable them to gain knowledge intuitively’. As regards humans, ‘in some special cases it is possible to gain brahmavidyā without the conventional guru and śāstra.
Both D & R agree that intuition (arsa or anubhava) is the province of the seers almost exclusively. But, is it so?
Intuition being a faculty of knowledge (there is sensory, mental or intellectual, and transcendental intuition), there are (must be) different degrees and subjects thereof. Further, intuition is (must be) itself a universal faculty. This is the sense in which SSSS employs the term and which appears frequently in his writings – ‘It is this immediate intuition alone that has been regarded as the valid means of right knowledge by Shankara, when he is speaking of the knowledge of Brahman’. – ‘Articles and Thoughts on VEDANTA’. p. 55.