The Catechism in Questions & Answers

466. How should a spiritual ministry be discharged?

Those who bear a spiritual ministry must live up to certain requirements in their conduct and spiritual competency. This includes familiarity with the doctrine, firmness in faith, awareness of his commission, carrying capacity, confidentiality, honesty, willingness to sacrifice, and humbleness. In all things the minister should take direction from the example of Jesus.
The minister must put into practice that which has been entrusted to him in the blessing and sanctification of his ordination in order that the gifts he has received may unfold to the benefit of the congregation.
Those who have been called to a spiritual ministry are aware that they are servants and instruments in the hand of God.