Past and Future
The older one gets, the more he is squeezed by both past and future (It is asymmetrical At first thought, it seems symmetrical, for the young have less past and more future, and the old have more past and less future However the old are crushed more by both past and future) Past haunts him more by more nostalgia, regret, remorse, missing, or things of those kinds (Simply because there are more pasts to look back) Future haunts him more by less time to live That's one misery of aging (But it doesn't apply to me)