Our concept of the past is in a state of uncertainty like the position of an electron: it can either be tragic or comedy, adventure or farce. But once told it is destroyed, changed forever, weighed, frozen. No longer a living mystery, it dies.
As for the future, some have speculated that by looking into space and determining what lies there, man is narrowing the future, reducing it to what we can see receding or approaching. If we'd never made telescopes, infinite futures might have remained, but as it is we are reducing all to narrow doom.
Somebody said "The unexamined life is not worth living" but one could equally well say that the unlived life is not worth examining and by implication that the examined life is not worth living. The examined life may be nothing more than an internal conversation about living, something like talking about jazz - which somebody said was like dancing about architecture. But there are philosophers who are paid to noodle on about such things and the best of luck to them, may they noodle forever.