'Servants' in the Bible

For we do not preach ourselves, but Jesus Christ as Lord, and ourselves [merely] as your bond-servants for Jesus’ sake.

but we commend ourselves in every way as servants of God: in great endurance, in sufferings, in hardships, in distresses,

So it is no great surprise if his servants also masquerade as servants of righteousness, but their end will correspond with their deeds.

Are they [self-proclaimed] servants of Christ?—I am speaking as if I were out of my mind—I am more so [for I exceed them]; with far more labors, with far more imprisonments, beaten times without number, and often in danger of death.