The meaning of the word "Ministry" evolved during the period of time covered by the Holy Bible: from the days of Moses to the days of the Apostles. During the early days covered by the Old Testament, the word "minister" was used to designate someone attending a high ranking person. A most characteristic identification of the ministry is with the Levites priests in the Temple: "At that time the Lord separated the tribe of Levi, to bear the ark of the covenant of the Lord, to stand before the Lord to minister unto him, and to bless his name, unto this day" (Deuteronomy 10:8).
"The work of the priesthood is done on earth, but it is ranked among heavenly ordinances. And this is only right, for no man, no angel, no archangel, no other created power, but the Paraclete Himself ordained this succession, and persuaded men, while still remaining in the flesh to represent the ministry of angels."
– St. John Chrysostom, On the Priesthood
"But ye shall be named Priests of the Lord: men shall call you the ministers of our God..." (Isaiah 61:6).
"The Lord has sworn And will not relent, You are a priest forever According to the order of Melchizedek."