Priesthood is the authority and power of God. In the Old Testament, the role of a priest was to stand between men and God. In the New Testament, this has changed; men can interact with God by themselves because after Jesus had paid the claims of divine justice on the Cross, the Bible says, "And, behold, the veil of the temple was rent in twain from the top to the bottom; and the earth quake, and the rocks rent" (Matthew 27:51), signifying that every individual has direct access to God and shares the responsibility of ministering to other believers in Christ.
Priesthood Orders
The Epistle to the Hebrews refers to two orders of priesthood: Melchizedek and the Leviticus priesthood. The Leviticus priesthood is the most popular in Scripture; however, the Melchizedek priesthood is considered the "higher priesthood" that incorporates all other priesthoods.
The Functions of Priesthood
Priesthood functions by altars. The thin line between the spiritual and the physical realm makes priesthood significant in connecting the two. Some qualities of a priest include a strong prayer life, the need to read the Word of God, and fellowship with other believers. Our father of faith, Abraham, was a priest and a man of the altar. It takes priesthood and the use of altars for men to secure answers from spirit beings.
The great need of God today is for priests who will pave the way in the spirit (altars) to engage God enough so that He will bring a revival, because the whole society of the human race needs it.