Ecclesiastes 12:9-14 (NKJV)
9 And moreover, because the Preacher was wise, he still taught the people knowledge; yes, he pondered and sought out and set in order many proverbs.
10 The Preacher sought to find acceptable words; and what was written was upright—words of truth.
11 The words of the wise are like goads, and the words of scholars are like well-driven nails, given by one Shepherd.
12 And further, my son, be admonished by these. Of making many books there is no end, and much study is wearisome to the flesh.
13 Let us hear the conclusion of the whole matter: Fear God and keep His commandments, For this is man’s all.
14 For God will bring every work into judgment, Including every secret thing, Whether good or evil.