It has its roots in both the Old and New Testaments. Here are a few passages you can read.
a. Numbers 11: 10-30 – God tells Moses to appoint 70 elders
b. Mark 3: 13-19 – Jesus appoints the Twelve
c. Luke 10: 1-9 – Jesus appoints 70 for Mission
d. I Corinthians 12: 4-13 – One body with many gifts
e. Ephesians 4: 1-13 – Gifts given to equip the saints for ministry
Mutual Ministry is a way of living out the Baptismal covenant, found in The Book of Common Prayer, pages 304-305. The renewed vision of the Ministry of all the Baptized is emphasized in the Catechism, found in The Book of Common Prayer, page 855, in the section on “The Ministry.” The first question asks, “Who are the ministers of the Church?” The answer is, “The ministers of the Church are lay persons, bishops, priests, and deacons.” “Lay persons” are intentionally listed first. The second question is, “What is the ministry of the laity?” “The ministry of lay persons is to represent Christ and his Church; to bear witness to him wherever they may be; and, according to the gifts given them, to carry on Christ’s work of reconciliation in the world; and to take their place in the life, worship, and governance of the Church.”