1 Corinthians 4:20

Let a man so account of us, as of the ministers of Christ, and stewards of the mysteries of God.

Moreover it is required in stewards, that a man be found faithful.

But with me it is a very small thing that I should be judged of you, or of man's judgment: yea, I judge not mine own self.

For I know nothing by myself; yet am I not hereby justified: but he that judgeth me is the Lord.