Self-Control - An Essential Qualification of God's Servant

A man of God should possess a disciplined life-style (rising early, keeping things tidy, eating moderately, talking sparingly and wisely, behaving modestly, studying purposefully, avoiding all appearance of evil, pursuing excellence with all diligence). He should bear self-control. He should also first be a good leader in his own home before he could be qualified to lead the family of God.

But I discipline my body and bring it into subjection, lest, when I have preached to others, I myself should become disqualified. (1Co 9:27)

A man without self-control is like a city broken into and left without walls. (Pro 25:28)

A bishop then must be blameless, the husband of one wife, temperate, sober-minded, of good behavior, hospitable, able to teach; not given to wine, not violent, not greedy for money, but gentle, not quarrelsome, not covetous; one who rules his own house well, having his children in submission with all reverence (for if a man does not know how to rule his own house, how will he take care of the church of God?); not a novice, lest being puffed up with pride he fall into the same condemnation as the devil. Moreover he must have a good testimony among those who are outside, lest he fall into reproach and the snare of the devil. (1Ti 3:2-7)

Likewise deacons must be reverent, not double-tongued, not given to much wine, not greedy for money, holding the mystery of the faith with a pure conscience. But let these also first be tested; then let them serve as deacons, being found blameless. Likewise, their wives must be reverent, not slanderers, temperate, faithful in all things. Let deacons be the husbands of one wife, ruling their children and their own houses well. (1Ti 3:8-12)

*All emphasis mine. The emphasis only highlight a few examples of self-control. They don't mean that these are more important. All the qualifications are binding.