Ecclesiastes 12:9-13

In addition to being wise, the Preacher also taught the people knowledge; and he pondered, searched out, and arranged many proverbs.

The Preacher sought to find delightful words and to write words of truth correctly.

The words of the wise are like goads, and masters of these collections are like driven nails; they are given by one Shepherd.

But beyond this, my son, be warned: the writing of many books is endless, and excessive study is wearying to the body.

The conclusion, when everything has been heard, is: fear God and keep His commandments, because this applies to every person.