4:8 A man who is all alone with no companion,
he has no children nor siblings;
yet there is no end to all his toil,
and he is never satisfied with riches.
He laments, “For whom am I toiling and depriving myself of pleasure?”
This also is futile and a burdensome task!
5:18 I have seen personally what is the only beneficial and appropriate course of action for people:
to eat and drink, and find enjoyment in all their hard work on earth
during the few days of their life which God has given them,
for this is their reward.
8:17 then I discerned all that God has done:
No one really comprehends what happens on earth.
Despite all human efforts to discover it, no one can ever grasp it.
Even if a wise person claimed that he understood,
he would not really comprehend it.