Nârada said: 'I know the Rig-veda, Sir, the Yagur-veda, the Sâma-veda, as the fourth the Âtharvana, as the fifth the Itihâsa-purâna (the Bhârata); the Veda of the Vedas (grammar); the Pitrya (the rules for the sacrifices for the ancestors); the Râsi (the science of numbers); the Daiva (the science of portents); the Nidhi (the science of time); the Vâkovâkya (logic); the Ekâyana (ethics); the Devavidyâ (etymology); the Brahma-vidyâ (pronunciation, sikshâ, ceremonial, kalpa, prosody, khandas); the Bhûta-vidyâ (the science of demons); the Kshatravidyâ (the science of weapons); the Nakshatra-vidyâ (astronomy); the Sarpa and Devagana-vidyâ (the science of serpents or poisons, and the sciences of the genii, such as the making of perfumes, dancing, singing, playing, and other fine arts). All this I know, Sir.

In plain words: Narada lists everything he has studied: the four Vedas (sacred books), history and legends, grammar, rituals for ancestors, math, logic, ethics, astronomy, weapons, the arts and many other subjects. He says he knows all of it.