If the limit of age 80 is at the summit of Mt Everest, the highest place on Earth, one can never be happier.

After retiring, I was a little bored with nothing to do and got fat. I thought, if a 60-year-old metabolic fat man, after five years, can get to Mount Everest, that would be very exciting.

I've been doing extremely dangerous activities for a long time, but I've been lucky enough to have survived so far. However, sooner or later we all die... and, if that's the case, I want to die doing what I love to do the most. That's how I view death.

I've learned through my own experiences that working toward an objective in your life can change who you are.