To me, though I am the very least of all the saints, this grace was given, to preach to the Gentiles the unsearchable riches of Christ, and to make all men see what is the plan of the mystery hidden for ages in God who created all things; that through the church the manifold wisdom of God might now be made known to the principalities and powers in the heavenly places.
God hides things in plain view. He hid the Second Person of the Trinity in plain view as a carpenter from Nazareth. And he hides the "mystery hidden for age in God" in plain view too. What is this tantalizing "mystery"? Will we only hear about it from psychics on Art Bell or by claiming mountains of contemplation in the Himalayas? Nope. It's right there in plain view. It's the Church. Through it–in all its lumpy awkwardness and failure "the manifold wisdom of God" is now made known. And not just to us humans. Powers and principalities are to benefit from the revelation. It's an awesome task, and Lord knows we are not up to it. Only God is. Thankfully, he's also the one who's going to do it.