The Bible tells us how the Diaconate first began:
Acts of the Apostles 6
1 Now in these days when the disciples were increasing in number, the Hellenists murmured against the Hebrews because their widows were neglected in the daily distribution.2 And the twelve summoned the body of the disciples and said, "It is not right that we should give up preaching the word of God to serve tables.3 Therefore, brethren, pick out from among you seven men of good repute, full of the Spirit and of wisdom, whom we may appoint to this duty.4 But we will devote ourselves to prayer and to the ministry of the word."5 And what they said pleased the whole multitude, and they chose Stephen, a man full of faith and of the Holy Spirit, and Philip, and Prochorus, and Nicanor, and Timon, and Parmenas, and Nicolaus, a proselyte of Antioch.6 These they set before the apostles, and they prayed and laid their hands upon them.7 And the word of God increased; and the number of the disciples multiplied greatly in Jerusalem, and a great many of the priests were obedient to the faith.8 And Stephen, full of grace and power, did great wonders and signs among the people.
1 Timothy 3:8-9 8 Deacons likewise must be serious, not double-tongued, not addicted to much wine, not greedy for gain;9 they must hold the mystery of the faith with a clear conscience.