"You should look upon us as ministers of Christ, as trustees (or stewards) of the secrets of God. And it is a prime requisite in a trustee that he should prove worthy of his trust." 1 Corinthians 4:1,2
It seems to me that Paul is very clearly using particular words here to make a very clear point for his friends. He is - they were - we are - "ministers of Christ," "stewards of the secrets of God," and it is of the highest importance that we "prove worthy of our trust." I think we think of "ministers of Christ" as being ministers toward others; "stewardship of His secrets" as being personal and, ultimately hidden; and the measure of the "trustworthiness" of our stewardship of His secrets as being synonymous with just "keeping the faith."
No, no, and no.
A "minister of Christ" is a minister to Christ: he is an armor-bearer, a helper to Him in His work. A "steward of the secrets" of the Kingdom of Heaven is an explorer, an adventurer, a spelunker: his whole life is lived lost in these treasures for a purpose. And the measure of our "trustworthiness" in all this is the measure to which we make it plain, make it speak, to the world around us.
So, we minister to Jesus by disappearing into His mysteries, so that we might constantly return to the world to hand off more and more of His treasure!
How's that sound to you?