A minister is one given charge over a divine assignment.
But to be in charge, you have to be in power.
It is power that puts people in charge.
When you are no longer in power you are no longer in charge.
So, to remain in charge you have to remain in power.
But to be in power you have to be in prayer.
Prayer is the umbilical cord between God and the minister. Luke 5:16, 17.
In prayer, you build up power.
Therefore, to remain in power, you must remain in prayer. Acts 1:18; 2:1-4; 4:23-33; 6:47.