The star of the 1995 Rugby World Cup Jonah Lomu says he doesn't think about rugby any more and just wants to see his two sons reach the age of 21.
Lomu, now 40 and on dialysis after his kidneys failed, wants to reach the age of 55 to see the coming of age of his sons Brayley, six, and Dhyreille, nearly five.
"My goal is to make it to the boys 21sts," he told the Daily Mail.
"There are no guarantees that will happen, but it's my focus.
"My dad died young and that makes you think. I want my boys to be healthy and if they get to 21, they should be fit and healthy and live a normal life."
In 2011 his body rejected his 2004 kidney transplant and he has been on dialysis - six hours at a time, three times a week - since.
His kidney condition should have prevented him having children, but the two boys with his wife Nadene were a miracle, he said.
"Never in my wildest dreams did I ever think I'd be a dad."
Now he has children he says he does not think about rugby any more and just wants to protect them from hardships he himself suffered growing up.
"I would not wish that on them and I would never let that happen."
Lomu played 63 Tests between 1994 and 2002 but the giant wing saved his best performances for the 1995 and 1999 world cups.
He is now doing promotional work for the 2015 RWC, which starts in England next month.
British media are still reminiscing over Lomu's four tries against the English in 1995, including the most famous in which he ran over fullback Mike Catt and became a household name.
Lomu said he had just been ankle tapped and that if Catt had been two or three steps further back he would have fallen in front of him. "He stood me back up."