It's hard to remember that it was not like this, once. A time when people you cared for didn't ever die? I can't remember a time like that.

Here's what Gerard Manley Hopkins had to say about it.

Spring and Fall:

MÁRGARÉT, áre you gríeving
Over Goldengrove unleaving?
Leáves, líke the things of man, you
With your fresh thoughts care for, can you?
Áh! ás the heart grows older
It will come to such sights colder
By and by, nor spare a sigh
Though worlds of wanwood leafmeal lie;
And yet you wíll weep and know why.
Now no matter, child, the name:
Sórrow's spríngs áre the same.
Nor mouth had, no nor mind, expressed
What heart heard of, ghost guessed:
It ís the blight man was born for,
It is Margaret you mourn for.