My dad pointed out to me one time that verses 2-5 of chapter 12 are Solomon describing people getting old. I thought that it was very interesting.
2 before the sun and the light
and the moon and the stars grow dark,
and the clouds return after the rain;
3 when the keepers of the house tremble,
and the strong men stoop,
when the grinders cease because they are few,
and those looking through the windows grow dim;
4 when the doors to the street are closed
and the sound of grinding fades;
when people rise up at the sound of birds,
but all their songs grow faint;
5 when people are afraid of heights
and of dangers in the streets;
when the almond tree blossoms
and the grasshopper drags itself along
and desire no longer is stirred.
Then people go to their eternal home
and mourners go about the streets