Any form of service you find yourself rendering in the body of Christ, or for the services and benefits of other men, is your ministry. Assuming that only the pastors or the choristers are ministers in the house of God is a misunderstanding of the word; minister. If it were to be so, then there is the likelihood for weakness and sudden breakdown. As such, everybody needs each other to function properly.

As a body, every part or an organ is very important. A slight pain on the thumb affects the whole body, therefore indicating that we are interconnected. In the church, we have different organs that minister to the people, either through words or by actions. Same as in our different offices and businesses. As important as the preacher may be, so is the usher. The sanctuary keepers are no less ministers than the choir. The instrumentalists are only different in the services they render, but are not independent on the body. The teachers need the students to administer the lessons, else there is no learning. The wife needs her husband, and the children equally need the parents and vice versa, else the family is incomplete.
As we are taking good care of our bodies by eating well, exercising and resting, so it is required that the church, our jobs, our families and our businesses should not be left to breakdown.