Mbh 2.5.2a

“Vaisampayana said,--“While the illustrious Pandavas were seated in that Sabha along with the principal Gandharvas, there came, O Bharata, unto that assembly the celestial Rishi Narada, conversant with the Vedas and Upanishadas, worshipped by the celestials acquainted with histories and Puranas, well-versed in all that occurred in ancient kalpas (cycles), conversant with Nyaya (logic) and the truth of moral science, possessing a complete knowledge of the six Angas (viz., pronunciation, grammar, prosody, explanation of basic terms, description of religious rites, and astronomy). He was a perfect master in reconciling contradictory texts and differentiating in applying general principles to particular cases, as also in interpreting contraries by reference to differences in situation, eloquent, resolute, intelligent, possessed of powerful memory. He was acquainted with the science of morals and politics, learned, proficient in distinguishing inferior things from superior ones, skilled in drawing inference from evidence, competent to judge of the correctness or incorrectness of syllogistic statements consisting of five propositions. He was capable of answering successively Vrihaspati himself while arguing, with definite conclusions properly framed about religion, wealth, pleasure and salvation, of great soul and beholding this whole universe, above, below, and around, as if it were present before his eyes. He was master of both the Sankhya and Yoga systems of philosophy, ever desirous of humbling the celestials and Asuras by fomenting quarrels among them, conversant with the sciences of war and treaty, proficient in drawing conclusions by judging of things not within direct ken, as also in the six sciences of treaty, war, military campaigns, maintenance of posts against the enemy and stratagems by ambuscades and reserves.