John 8:34, 36
34 Jesus answered them, Verily, verily, I say unto you, Whosoever committeth sin is the servant of sin.
36 If the Son therefore shall make you free, ye shall be free indeed.
Romans 6:18, 22
18 Being then made free from sin, ye became the servants of righteousness.
22 But now being made free from sin, and become servants to God, ye have your fruit unto holiness, and the end everlasting life.
Romans 7:15, 18-19, 21, 23
15 For that which I do I allow not: for what I would, that do I not; but what I hate, that do I.
18 For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not.
19 For the good that I would I do not: but the evil which I would not, that I do.
21 I find then a law, that, when I would do good, evil is present with me.
23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members.