For sin shall not have dominion over you: for you are not under the law, but under grace. -Romans 6:14

Every living man before he is converted, is a slave to lust. Profane men glory in free living and free thinking. They call this free living-a full glass, a Bacchanalian revel, shouting, wantonness, chambering.-Free living, sir! Let the slave hold up his fetters and jingle them in my ears, and say, “This is music, and I am free.” The man is a poor maniac. Let the man chained in his cell, the madman of Bethlehem, tell me he is a king, and grin a horrible smile; I say, “Ah, poor wretch, I know wherefore he counteth that he is a king; he is demented, and is mad.” So it is with the worldling who says he is free. Free sir! you are a slave. You think you are happy; but at night, when you lay yourself upon your bed, how many times have you tossed from side to side sleepless and ill at ease; and when you awaked have you not said, “Ah! that yesterday-that yesterday !” And though you plunged into another day of sin, that “yesterday,” like a hell-dog, barked at you, and followed at your heels. You know it, sir,-sin is a bondage and a slavery. And have you ever tried to get rid of that slavery? “Yes,” you say, “I have.” But I will tell you what has been the end of it. When you have tried, you have bound your fetters firmer than ever; you have riveted your chains…

A sinner without grace is a slave: he cannot deliver himself from his sins. But not so the Christian! Is he a slave to his sin? Is a true-born heir of God a slave? Oh, no. He does not sin, because he is born of God; he does not live in uncleanness, because he is an heir of immortality. Ye beggars of the earth may stoop to deeds of wrong, but princes of heaven’s blood must follow acts of right. Ye poor worldlings, mean and pitiful wretches in God’s sight–ye may live in dishonesty and unrighteousness, but the heir of heaven cannot; he loves his Lord; he is free from the power of sin; his work is righteousness, and his end is everlasting life. We are free from the dominion of sin. ~C.H. Spurgeon

http://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0009.cfm