The word “blameless” as a requirement for bishops and deacons occurs 5 times in I Timothy and Titus. It means unaccusable, unreprovable, not open to censure. The requirements for this office consist entirely of character qualities and family management, except that bishops must be able to teach. The term bishop and elder are used interchangeably for those who have oversight over a congregation, while the deacon deals primarily with physical needs. The term “priest” is never used to describe any New Testament church leader.
Leaders in the New Testament were chosen in a variety of ways, by different types of church leaders or by consensus.
1) When the choice is between two qualified men, the lot is used. Acts 1:23-26 (See also Proverbs 18:18).
2) By consensus of the church: Acts 6:1-7
3) By divine revelation: Acts 9; Acts 13:2-3; I Timothy 1:18
4) Appointed by an individual in authority (these cases seem to be churches that weren’t well established yet) Acts 16:1-3; 2 Timothy 2:1; Titus 1:5; I Corinthians 4:17
5) By apostle and others choosing together: Acts 14:23; Acts 15:22