When I contemplate the accumulation of guilt and remorse which, like a garbage-can, I carry through life, and which is fed not only by the lightest action but by the most harmless pleasure, I feel Man to be of all living things the most biologically incompetent and ill-organized. Why has he acquired a seventy years life-span only to poison it incurably by the mere being of himself? Why has he thrown Conscience, like a dead rat, to putrefy in the well?
— Cyril Connolly

Imagine that: If you could change one of the genes in an experiment, an aging gene, maybe you could slow down aging and extend lifespan.
Cynthia Kenyon lifespan quote

SpaceX is only 12 years old now. Between now and 2040, the company's lifespan will have tripled. If we have linear improvement in technology, as opposed to logarithmic, then we should have a significant base on Mars, perhaps with thousands or tens of thousands of people.
— Elon Musk

The highly functional infrastructure that surrounds us, particularly in the West, is a gift from our ancestors: the comparatively uncorrupt political and economic systems, the technology, the wealth, the lifespan, the freedom, the luxury, and the opportunity.
— Jordan Peterson

You can't have it all, all at once. Who - man or woman - has it all, all at once? Over my lifespan, I think I have had it all. But in different periods of time, things were rough. And if you have a caring life partner, you help the other person when that person needs it.
— lifespan quotation by Ruth Bader Ginsburg