Some would define a servant like this: 'A servant is one who finds out what his master wants him to do, and then he does it.' The human concept of a servant is that a servant goes to the master and says, 'Master, what do you want me to do?' The master tells him, and the servant goes off BY HIMSELF and does it. That is not the biblical concept of a servant of God. Being a servant of God is different from being a servant of a human master. A servant of a human master works FOR his master. God, however, works THROUGH His servants.
Henry Blackaby