The most unsettling thing about retirement is entering a vegetative state. Nobody cares about you anymore, and nobody expects anything of you anymore. Curiously, that’s the exact opposite of what working people complain about.
Life was created only once, by accident. It’s just perpetuating ever since. That’s why science has such a hard time recreating it. Two RNA molecules got accidentally matched, which created self-replicating DNA. That’s how life started.
