'Ministry' in the Bible

What is Apollos, really? Or what is Paul? Servants through whom you came to believe, and each of us in the ministry the Lord gave us.

Or is it only Barnabas and I who have no right to stop doing manual labor [in order to support our ministry]?

because a wide door for effective ministry has opened for me—yet many oppose me.

I beseech you, brethren, (ye know the house of Stephanas, that it is the firstfruits of Achaia, and that they have addicted themselves to the ministry of the saints,)