He must be: blameless, above reproach, one that rules well his own house.
If he cannot rule his own house how can he rule the house of God?
Those are not my words, but God's words, and God's standard.
Sin has its consequences. I know a man who came to Christ as a result of a car accident. The accident was caused by drunkenness. The man was saved, forgiven, called to full time ministry, and is a pastor today. He is also a paraplegic, and unable to use his legs. He will never have the use of his legs but will always be confined to a wheel chair until Christ comes. His sins are forgiven, but the consequence of his sins will forever remain with him or at least til the end of this earthly life.
The consequence of a man not keeping his house in order, is disqualification from the ministry. It is clear, in black and white, in 1Tim. 3. The sin is forgiven. The consequences are there and will remain in place until death or Christ comes again.
Eve sinned. She took of the fruit of the tree of the knowledge of good and evil, not Adam (at least not initially). But to Adam was the sin imputed. Why? Adam did not have control over his wife, over his house. He gave in to her wishes, and rebelled against God. The sin was imputed to Adam, even though Eve had partook of the forbidden fruit first. A man must rule his house. God has set him over the household as the head of the house. This principle is clearly taught in 1Cor.11:1-4.