Ecclesiastes 8:16-17

16I tried very much to become wise. I wanted to understand the things that people do on the earth. People work in the day and in the night and they do not sleep.

17I thought about everything that God has done. I realized that nobody understands everything that happens on the earth. Even if they try very much, they will not know everything. A wise person may say that he understands all these things. But really that is not possible.