An interesting conversation between the Jews and Jesus. Read it in context....
But the point that Jesus highlighted is that if we are committing sin we are a servent of sin. We are in bondage to sin if we can't become free of it.
Joh 8:32-36
32 And ye shall know the truth, and the truth shall make you free. 33 They answered him, We be Abraham's seed, and were never in bondage to any man: how sayest thou, Ye shall be made free? 34 Jesus answered them, Verily, verily, I say unto you, Whosoever committeth sin is the servant of sin. 35 And the servant abideth not in the house for ever: but the Son abideth ever. 36 If the Son therefore shall make you free, ye shall be free indeed.....:39 They answered and said unto him, Abraham is our father. Jesus saith unto them, If ye were Abraham's children, ye would do the works of Abraham.
So does Jesus make us free from sin or just free from the penalty of sin?
Paul helps us to understand this in Roms 6. Read all of it....
Rom 6:12-13
12 Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof. 13 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.
Rom 6:17-18
17 But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you. 18 Being then made free from sin, ye became the servants of righteousness.
Rom 6:22 But now being made free from sin, and become servants to God, ye have your fruit unto holiness, and the end everlasting life.
Point being we are servents to sin or servents to Christ. Faith is vital but without a changed heart the faith is not going to help. Faith and works are important together. Our works do not gain favour they reflect the faith we believe.