Ecclesiastes 12:9 - Matthew Poole's English Annotations on the Holy Bible

The preacher was wise; which he affirmeth not out of vain ostentation, but partly to procure the more credit and acceptance to his doctrine and, counsel here delivered; and partly to declare his repentance for his former follies, and God's great mercy in restoring his wisdom to him. Taught the people knowledge; as God gave him this wisdom, that he might be a teacher of others, so he used it to that end; therefore despise not his counsel. He gave good heed; he did not rashly and foolishly utter whatsoever came into his mind or mouth, but seriously pondered both his matter and words. Sought out; both by the exercise of his own mind, and by reading and learning from others. Set in order; or, directed or fitted. He selected such as were most useful. Many proverbs; excellent and wise sayings, which are oft called proverbs, as was noted before upon the Book of Proverbs.