Just as Jonah was a prophet, ministers are to be prophets. We are to proclaim that Jesus will return to take the believers with him to Heaven. We can't have the heart that Jonah had. We must want everyone to receive God's grace. In a land of "justice for all" it's often easy to forget about God's grace. Ultimately when my life is over I don't want justice- I want grace. God's grace will cover a multitude of sin and we must remember that as we minister to others.
Ministers must be prophets who go to everyone- good and bad- to tell them the story of Jesus and of his soon return.