I think, perhaps, it’s captured in these lines, that rarely fail to bring a tear to this old man’s eyes:

I have heard what the talkers were talking, the talk of the beginning and the end,
But I do not talk of the beginning or the end.
There was never any more inception than there is now,
Nor any more youth or age than there is now,
And will never be any more perfection than there is now,
Nor any more heaven or hell than there is now.

- Walt Whitman