There is a difference between career and ministry. When one thinks of career it is in terms of doing something and then getting promoted to get more of something, such as power, money, larger office, and so on. You do good work, or what work you see as advancing your status. Ministry, on the other hand, is usually more of a servant work. You serve others, not to advance yourself, but rather simply to be of service in the kingdom of God. Grace moves you to keep going. The relationship with God and the People of God is its own reward. You live amidst the people. You share their lives. If you look at the bishop tract over the last 35 years or so, you will see in their advancement up the ladder, very little work amidst the people. They do little parish work. They go to school for advanced church law or other degrees and then work in central offices or seminaries. They don't learn to listen or interact with the "people below." It is called, "not taking incoming phone calls."