Mark 9:35
Sitting down, He called the twelve and *said to them, “If anyone wants to be first, he shall be last of all and servant of all.”
The most important factor about being a leader, Jesus taught us, is being the servant of all.
The first requirement of leadership in the church is to be called by the Holy Spirit:
"Pay careful attention to yourselves and to all the flock, in which the Holy Spirit has made you overseers, to care for the church of God” (Acts 20:28).
“The saying is trustworthy: If anyone aspires to the office of overseer, he desires a noble task” (1 Tim. 3:1).
“Shepherd the flock of God that is among you, exercising oversight, not under compulsion, but willingly, as God would have you; not for shameful gain, but eagerly” (1 Peter 5:2).
1 Timothy 3:1-13 gives us God's command for who is qualified, and who is not, to be a leader, focusing on the quality of character, faith, integrity, and fruitfullness displayed int he person's life:
Here is a trustworthy saying: Whoever aspires to be an overseer desires a noble task. Now the overseer is to be above reproach, faithful to his wife, temperate, self-controlled, respectable, hospitable, able to teach, not given to drunkenness, not violent but gentle, not quarrelsome, not a lover of money. He must manage his own family well and see that his children obey him, and he must do so in a manner worthy of full respect. (If anyone does not know how to manage his own family, how can he take care of God’s church?) He must not be a recent convert, or he may become conceited and fall under the same judgment as the devil. He must also have a good reputation with outsiders, so that he will not fall into disgrace and into the devil’s trap.
In the same way, deacons are to be worthy of respect, sincere, not indulging in much wine, and not pursuing dishonest gain. They must keep hold of the deep truths of the faith with a clear conscience. They must first be tested; and then if there is nothing against them, let them serve as deacons.
In the same way, the women are to be worthy of respect, not malicious talkers but temperate and trustworthy in everything.
A deacon must be faithful to his wife and must manage his children and his household well. Those who have served well gain an excellent standing and great assurance in their faith in Christ Jesus.