Two purposes are named: first, personal certainty — the individual reader knowing with confidence that God's Word is true and reliable. Second, outward communication — being equipped to give true answers to those who come asking. Wisdom is not just for private benefit but for the benefit of others who need truth.
Memory phrase: Know the truth. Share it.
Talk about it: Who could you share one true thing from God's Word with today?
Prayer: God, let me know Your truth so I can share it.