While there are many spiritual gifts, the offices of the bishop and of the deacon are the two official offices that exist in the biblically defined New Testament church for leadership and operation under the authority of the Holy Spirit (1 Timothy 3:1, 8).
The office of the bishop is synonymous in scripture with that of the elder and is a term to denote the called and qualified preachers of the Word of God. There are many proofs that bishops and elders were the same, and it was not until the apostasy of the Roman Catholic Church that a distinction was created.