The occasion of electing the 12th apostle demonstrates a few principles of administration or decision-making in the Church.

First, it is the Holy Spirit who decides and operates. Peter or the assembly of the apostles and disciples could select the 12th apostle. But they submitted their will to the Holy Spirit. The Church does not operate by one human person or an assembly. The Church is not a monarchy or democracy. Christ is the Head, and his Spirit governs the Mystical Body, the Church.

Second, the Scriptures and the Tradition are the two sources of the faith. Peter quotes the Scriptural prophecy for its fulfillment to replace the place of Judas. And he presents a qualification for the replacing apostle. It was a disciple who witnessed all the ministry of Jesus but also the resurrection and ascension. From these eyewitnesses, the Church received her Tradition. And the apostles received all from Christ Jesus.

Third, then, why the apostles and disciples gathered for the election? The gathering warrants the transparency of the process to remove any doubt and suspicion. But to gather in his name is what Jesus commanded for the guarantee of his presence. The Holy Spirit is present in the Church assembly. And he reveals his divine will in the Church gathering. Jesus called us as his friends to whom he let his will known.

Although Jesus had ascended to heaven, his Spirit governed the Church. It has been the same ever since. The Church is never a human institution. When we gather, Christ is with us.