'Servants' in the Bible

who made us adequate to be servants of a new covenant not based on the letter but on the Spirit, for the letter kills, but the Spirit gives life.

But as God's servants, we have commended ourselves in every way, with great endurance, in persecutions, in difficulties, in distresses,

Therefore it is not surprising his servants also disguise themselves as servants of righteousness, whose end will correspond to their actions.

Are they servants of Christ? (I am talking like I am out of my mind!) I am even more so: with much greater labors, with far more imprisonments, with more severe beatings, facing death many times.