Part 4 of the interview with Jinan Kodapully conducted in November 2009. It is about his experiences and views on the 'biology of learning' coming from his work with tribal artisans, villagers, illiterate communities and in children's development in the last 20 years. In part 4 Jinan talks about his search for knowledge, when he stopped reading for 7 years and learned from being in illiterate communities and from being with children.