"Whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power. Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ." Ephesians 3:7-8

The word "unsearchable" is anexichniaston, from exichniazō. "to trace out," and Alpha privative which negates the word, making it mean, "that which cannot be traced out." 

"To the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God."  Ephesians 3:10

 "Manifold" is polupoikilos, "much - variegated, marked with a great variety of colors." -Wuest's

Translation: In order that there might be made known now to the principalities and powers in the heavenly places, through the intermediate agency of the Church, the much variegated wisdom of God.

 

"In whom we have boldness and access with confidence..." Eph 3:12