S. Jay Olshansky

The last thing you ever want to do is extend the period of frailty and disability and make people unhealthy for a longer time period. So lifespan extension in and of itself should not be the goal of medicine, nor should it be the goal of public health, nor should it be the goal of aging science.

The real problem is that there's a tendency to associate ageing with loss and decline and things that aren't desirable. But experiencing all that there is to experience in life - whether that's at the age of ten or thirty or fifty or eighty - is what life is all about.