2:19 Who knows if he will be a wise man or a fool?
Yet he will be master over all the fruit of my labor
for which I worked so wisely on earth!
This also is futile!
4:1 So I again considered all the oppression that continually occurs on earth.
This is what I saw:
The oppressed were in tears, but no one was comforting them;
no one delivers them from the power of their oppressors.
4:4 Then I considered all the skillful work that is done:
Surely it is nothing more than competition between one person and another.
This also is profitless – like chasing the wind.
4:16 There is no end to all the people nor to the past generations,
yet future generations will not rejoice in him.
This also is profitless and like chasing the wind.
7:28 What I have continually sought, I have not found;
I have found only one upright man among a thousand,
but I have not found one upright woman among all of them.
9:10 Whatever you find to do with your hands,
do it with all your might,
because there is neither work nor planning nor knowledge nor wisdom in the grave,
the place where you will eventually go.
12:4 and the doors along the street are shut;
when the sound of the grinding mill grows low,
and one is awakened by the sound of a bird,
and all their songs grow faint,