Alain de Botton in School of Life:
The normal way we set about trying to extend our lives is by striving to add more years to them – usually by eating more couscous and broccoli, going to bed early and running in the rain. But this approach may turn out to be quixotic, not only because Death can’t reliably be warded off with kale, but at a deeper level, because the best way to lengthen a life is not by attempting to stick more years on to its tail.
One of the most basic facts about time is that, even though we insist on measuring it as if it were an objective unit, it doesn’t, in all conditions, feel as if it were moving at the same pace. Five minutes can feel like an hour; ten hours can feel like five minutes. A decade may pass like two years; two years may acquire the weight of half a century. And so on.
In other words, our subjective experience of time bears precious little relation to the way we like to measure it on a clock. Time moves more or less slowly according to the vagaries of the human mind: it may fly or it may drag. It may evaporate into airy nothing or achieve enduring density.
If the goal is to have a longer life, whatever the dieticians may urge, it seems like the priority should not be to add raw increments of time but to ensure that whatever years remain feel appropriately substantial. The aim should be to densify time rather than to try to extract one or two more years from the fickle grip of Death.