Deacons…serve to care for the physical and financial needs of the church, and they do so in a way that heals divisions, brings unity under the Word, and supports the leadership of the elders. Without this practical service of the deacons, the elders will not be freed to devote themselves to praying and serving the Word to the people. Elders need deacons to serve practically, and deacons need elders to lead spiritually (Mark Dever and Paul Alexander).
Other Authors