Proverbs 14:6

Knowledge is not difficult to find. It is everywhere. Honest people will tell their knowledge to us (as in verse 5). The Bible will teach God’s knowledge to us. Many other books will teach human knowledge to us.

However, if someone insults other people, he will not learn knowledge or wisdom. Perhaps he insults honest people, so he cannot hear the honest words. Perhaps he insults everyone, and only listens to his own ideas.