1This is a faithful saying: someone who seeks to be an overseer desires a good work. 2The overseer therefore must be without reproach, the husband of one wife, temperate, sensible, modest, hospitable, good at teaching; 3not a drinker, not violent, not greedy for money, but gentle, not quarrelsome, not covetous; 4one who rules his own house well, having children in subjection with all reverence; 5(for how could someone who doesn’t know how to rule his own house take care of God’s assembly?) 6not a new convert, lest being puffed up he fall into the same condemnation as the devil. 7Moreover he must have good testimony from those who are outside, to avoid falling into reproach and the snare of the devil.
8Servants, in the same way, must be reverent, not double-tongued, not addicted to much wine, not greedy for money, 9holding the mystery of the faith in a pure conscience. 10Let them also first be tested; then let them serve if they are blameless. 11Their wives in the same way must be reverent, not slanderers, temperate, and faithful in all things. 12Let servants be husbands of one wife, ruling their children and their own houses well. 13For those who have served well gain for themselves a good standing and great boldness in the faith which is in Christ Jesus.
14These things I write to you, hoping to come to you shortly, 15but if I wait long, that you may know how men ought to behave themselves in God’s house, which is the assembly of the living God, the pillar and ground of the truth. 16Without controversy, the mystery of godliness is great:
God was revealed in the flesh,
justified in the spirit,
seen by angels,
preached among the nations,
believed on in the world,
and received up in glory.
The "wine" spoken of in this passage is with little doubt fermented since the word is oinos (οἶνος), a translation of the Hebrew word yayin (יַ֜יִן). The word for "grape juice" (thus not fermented) is trux (τρύξ), a word not found in the New Testament. The limited use of grape juice may relate to the rapid fermentation of grape juice in the climate of Israel. It was common, however, to mix two to three parts water with wine in the first century, a practice that came from Greece with the Hellenizing influence that came from Alexander the Great's entrance into Semitic culture in the middle of the 4th century B.C. This was largely done in order to lessen the cost of wine rather than for sterilizing the water, which is sometimes posited as the reason.
You may read a more extensive study of wine in my article on wine at [H. Wayne House], "Wine," Baker Encyclopedia of the Bible, Vol 2, J-Z, Walter A. Elwell, Gen. Ed. (Grand Rapids, MI: Baker Book House), 2145-2148.