goenka says there are like 4 steps to full enlightenment. he talks about maximum of 7 lifes to the second stage of enlightenment after you have reached the first.
Goenka-ji is correct. The Buddha taught that once a being has become a Sotapanna he will reach full enlightenment in no more than
7 more lifetimes. To become a Sotapanna is not an easy task - and we have all being wandering in Samsara through uncountable aeons without reaching this first level of enlightenment.From Puthujjana to the Buddha
( Reference: Brahmajala Sutta)http://web.ukonline.co.uk/buddhism/ariyacht.htm