If changing our world is playing God, it is just one more way in which God made us in His image.

It's not just about life, of course; it's about healthy life. Getting frail and miserable and dependent is no fun, whether or not dying may be fun.

I'm the chief science officer of a foundation that works on the application of regenerative medicine to the problem of aging.

What I'm after is not living to 1,000. I'm after letting people avoid death for as long as they want to.

Theres no such thing as ageing gracefully. I dont meet people who want to get Alzheimers disease, or who want to get cancer or arthritis or any of the other things that afflict the elderly. Ageing is bad for you, and we better just actually accept that.

There is no difference between saving lives and extending lives, because in both cases we are giving people the chance of more life.

The aim is to postpone frailty, postpone degenerative disease, debilitation and so on and thereby shorten the period at the end of life, which is passed in a decrepit or disabled state, while extending life as a whole.