Deacons likewise must be serious, not double-tongued, not indulging in much wine, not greedy for money; they must hold fast to the mystery of the faith with a clear conscience. And let them first be tested; then, if they prove themselves blameless, let them serve as deacons.
…for those who serve well as deacons gain a good standing for themselves and great boldness in the faith that is in Christ Jesus.
1 Timothy 3:8–10, 13 (NRSV)