The point of these verses is this: Because the Scriptures are the Word of God — the communication and revelation of the living God — they have effects on us that are better than the effects of anything else we can read or study or watch or listen to.
God understands you better than anyone else. He knows how people get to be the way they are and how they are affected by their surroundings. God understands society perfectly. God knows all facts about how the world works. God knows the future and how everything will come out in the end. God is wiser than any wise writer. God is more caring than any counselor. God is more creative than any artist. It simply stands to reason that what God says will be more useful to us than what anyone else in the universe has to say. Not to sit at his feet and soak our minds with his wisdom is sheer craziness
May God increase your confidence that the Bible is his very word! And may that persuade you that by meditating on it and following it there is great reward — greater than much fine gold. And may you discover every day the benefits of life and wisdom and joy!