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

Just keep challenging yourself. I think that's a great thing.

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

Religion provides the only story that is fundamentally consoling in the face of the worst possible experiences - the death of a parent, for instance. In fact, many religions take away the problem entirely, because their adherents ostensibly believe that they're going to be reunited with everyone they love, and death is an illusion.

Planning to play: that's what saving for retirement is today - and it is antithetical to the nature of play, fully within the definition of work, and blissfully ignorant of the reality of death.

I watched children dying. That will be the image that will stay with me.

In my house, we couldn't listen to 'Love to Love You Baby.' It was way too salacious back in the day. I remember my mom would turn the station off when that song came on the radio. But, of course, I played my album to death in my bedroom, with the door closed.