'Instrument' in the Bible

But the Lord said to him, “Go, for this man is a [deliberately] chosen instrument of Mine, to bear My name before the Gentiles and kings and the sons of Israel;

We know that our old self [our human nature without the Holy Spirit] was nailed to the cross with Him, in order that our body of sin might be done away with, so that we would no longer be slaves to sin.

For I will not [even] presume to speak of anything except what Christ has done through me [as an instrument in His hands], resulting in the obedience of the Gentiles [to the gospel], by word and deed,