Ministry is an office of service that a person is called to by God. “To minister” it is a participation in what God is doing to reconcile the world to himself- through Christ in the Holy Spirit.
Ephesians 4:7, 8, 11-13
7 But to each one of us grace has been given as Christ apportioned it.
8 This is why it says: “When he ascended on high, he took many captives and gave gifts to his people.
11 So Christ himself gave the apostles, the prophets, the evangelists, the pastors and teachers,
12 to equip his people for works of service, so that the body of Christ may be build up.
13 until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ.
1 Corinthians 12:28
28 And God has placed in the church first of all apostles, second prophets, third teachers, then miracles, then gifts of healing, of helping, of guidance, and of different kinds of tongues.