Neither yield ye your members as instruments of unrighteousness unto sin; but yield yourselves unto God, as those that are alive from the dead; and your members as instruments of righteousness unto God. Romans 6:13.
If God has my members as weapons and instruments in his hands, I shall certainly be able not only to work, but also to conquer, since he understands full well how to manage them. May the Lord only give me grace not to wind myself out of his hands, else I must needs be like a dead, useless carcass. For how can a pen write alone without being in the hand of the writer? It is true indeed, that it is very hard, nay, impossible to be really good, and do all that is good, if we undertake it alone; but God himself living and working in us, and we truly delighting in him, it is very easy and pleasant. Therefore care is only to be taken, that our hearts may be always the working place, and our members the instruments of God, in which and through which he can perform every thing himself.
Now God I serve, to him alone
My thankful homage pay;
My only Master, Christ, I own.
And him will I obey.
To him my members I present,
Which he will not refuse,
The meanest, basest instrument,
His glory deigns to use.
Servant of sin too long I was,
But Christ has set me free!
Glory to his victorious grace
Which freely ransomed me.