“Before Vyasadeva’s writing, the Vedic literature was simply heard, and the disciples would learn the mantras quickly by hearing and not by reading. Later on, Vyasadeva thought it wise to write down the Vedas, because in this age people are short-memoried and unable to remember all the instructions given by the spiritual master. Therefore, he left all the Vedic knowledge in book form, such as the Puranas, Vedanta, Mahabharata and Shrimad-Bhagavatam.” (The Nectar of Devotion, Ch 5)