Question: So the average is about three thousand years?
Sri Chinmoy: Human beings can get realisation in two to three thousand years. Again, some are tired soldiers; they want to take rest after one incarnation, and then they don't make progress for a long time. For many years they make no progress at all. Like bad students, they come back to the same class again and again.
Sri Chinmoy, Secrets of the inner world, Agni Press, 1980