Ecclesiastes 2:10-11, 24

Anything I saw and wanted, I got for myself; I did not miss any pleasure I desired. I was pleased with everything I did, and this pleasure was the reward for all my hard work. But then I looked at what I had done, and I thought about all the hard work. Suddenly I realized it was useless, like chasing the wind. There is nothing to gain from anything we do here on earth.

The best that people can do is eat, drink, and enjoy their work. I saw that even this comes from God