“God’s purpose in all this was to use the church to display his wisdom in its rich variety to all the unseen rulers and authorities in the heavenly places” (Ephesians 3:10, NLT).
We tend to think of wisdom in terms of lessons learned by older folks, like don’t get involved in a land war in Asia (sorry, couldn’t resist quoting from Princess Bride). There are many kinds of wisdom and it doesn’t only come from the elderly. Wisdom can come from anyone, at any age and in any circumstance. Some even believe in the wisdom of animals.
God is the source of all wisdom, and gives it freely. As this verse says, his wisdom is rich in variety and he uses his church (his body) to display it. We don’t always do a good job of that, but maybe we are looking for wisdom in ourselves. His wisdom is on display, not ours, which means it doesn’t look like ours and often may not even be apparent except to those unseen rulers and authorities Paul mentioned. The wisdom of God is rich in variety and often way above our heads. Thankfully he shares it with us if we will only ask (James 1:5).