Proverbs 2:5, 6 Then shalt thou understand the fear of the Lord, and find the knowledge of God. For the Lord giveth wisdom: out of his mouth cometh knowledge and understanding.
God promises wisdom, knowledge, and understanding. These words are synonyms with some nuanced differences. We need wisdom, indeed, we crave it. How wonderful it would be to make the best decisions and then carry them out! But this wonderful promise is conditional. The “if” clauses preceding this promise are summed up in the activity: Listen to God. If you receive my (Wisdom’s = Jesus’) words; if you listen to wisdom (Jesus); if you apply your heart to understanding; if cry after knowledge; if you seek it as treasure, then you will be wise, know the right things, and understand them.
In other words, hear the Word of Law and Gospel and life will be better. Promise. Hear the Law so that you know what to do. Hear the Gospel so that you have the power to do it. Do everything you can to know the Word of God, and thereby you know the Lord better.
When Jesus lives with you, you have an intimate knowledge of God, who is always good and right. When Jesus lives with you, you have an understanding of what is really beneficial and harmful, helpful and hurtful, blessing and cursing, good and bad, right and wrong, life and death. When Jesus lives with you, you have the wisdom to know how to apply the best thing at the right time to the right people in the right way. That would be superhuman, but that is what Jesus, the Wisdom of God, is for us: a real undefiled human.