In addition to the Teacher being a wise man, he constantly taught the people knowledge; he weighed, explored, and arranged many proverbs.
References for Ecclesiastes 12:9
The Teacher sought to find delightful sayings and to accurately write words of truth.
The sayings of the wise are like goads, and those from masters of collections are like firmly embedded nails. The sayings are given by one Shepherd.
References for Ecclesiastes 12:11
But beyond these, my son, be warned: there is no end to the making of many books, and much study wearies the body.
When all has been heard, the conclusion of the matter is: fear God and keep His commands, because this [is for] all humanity.
References for Ecclesiastes 12:13
For God will bring every act to judgment, including every hidden thing, whether good or evil.
References for Ecclesiastes 12:14