Ecclesiastes 4:4; Ecclesiastes 4:7-8
I have also learned why people work so hard to succeed: it is because they envy the things their neighbors have. But it is useless. It is like chasing the wind.
I have noticed something else in life that is useless.
Here is someone who lives alone. He has no son, no brother, yet he is always working, never satisfied with the wealth he has. For whom is he working so hard and denying himself any pleasure? This is useless, too - and a miserable way to live.