We see within the context of God’s Word that there is an official “office of a deacon”, just as there is an “office of a bishop”. These two offices make up the leadership of the church.
1 Timothy 3:1
This is a true saying, If a man desire the office of a bishop…
1 Timothy 3:13
For they that have used the office of a deacon well purchase to themselves a good degree…
Paul and Timotheus, the servants of Jesus Christ, to all the saints in Christ Jesus which are at Philippi, with the bishops and deacons:
This “office of a deacon” is part of the organisational structure to support the growth of the organism called the church. Those who fill this role are there to help oversee (manage) the physical needs of the church so that the elder-overseer (the pastor) can focus on equipping the house of God with the proper tools to grow and be effective in their walks with Christ. Not that ministering to physical needs is beneath the job of a pastor, but their primary role is the ministry of the Word.
Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.
There are times when pastors should be about doing these other things, but if it begins to pull them away from their primary purpose then something needs to change because they cannot do it all effectively. Something or everything will suffer because of it. People will be neglected, the flock will starve, and the church will stager.
And in those days, when the number of the disciples was multiplied, there arose a murmuring of the Grecians against the Hebrews, because their widows were neglected in the daily ministration.
Therefore, because carry a specific title, such as the overseer, and have a specific role to fulfil within the house of God, Paul spends some time laying out in detail the full qualifications for the office of a deacon.