Isaiah 6:7
“And he laid it upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged.”
One of the greatest battles that every Christian fights is that of completely overcoming sin. Every Christian battles sin. Certainly, your sin is different from mine, but we all have that “sin which doth so easily beset us.” (Hebrews 12:1)
The battle that tends to discourage most Christians is that they quit sin and think they have finally found victory only to see it reappear. Even the Apostle Paul shows this battle in Romans 7. Our desire is to see our sin “purged” from our lives. We want to see the sin completely cleansed so that we never commit it again. How does you to the point to where a sin is purged from your life? I believe God shows us from Isaiah’s life. God told him, “…thine iniquity is taken away, and thy sin purged.” There were four things that Isaiah did before God took the temptation away and purged him of his sin.
First, you must see the holiness of God. Verse 3 says, “…Holy, holy, holy, is the LORD of hosts…” Seeing the holiness of God reveals the depravity of your sin. You will never see God’s holiness until you spend time reading the Scriptures. You may not see the value of reading the Scriptures, but they have a way of showing you the holiness of God. Just reading the words of God opens your eyes to His holiness. If you want your sin purged, then you must spend time in the Scriptures so you can see God’s holiness.
Second, you must see the unholiness of man. Verse 5 says, “Then said I, Woe is me! for I am undone…” Notice how seeing the holiness of God showed Isaiah his unholiness. One of the reasons we struggle with purging our sin is because we never see how sinful we are. Until you realize that you are not as good as you think you are, you will never see complete victory over sin.
Third, you must see the depravity of your actions. Verse 5 continues by saying, “…because I am a man of unclean lips…” Isaiah not only saw how unholy he was, but he acknowledged the depravity of his actions. God cannot purge you from sin until you stop giving excuses for why you have done wrong and admit your 
actions are completely your fault. Too many people give an excuse as to why they do wrong, when God wants you to admit your actions were not only wrong but very depraved.
Fourth, you must see the helplessness of man. Verse 5 continues to say, “…and I dwell in the midst of a people of unclean lips…” In other words, you must realize that you cannot help yourself, and neither can man. All too often we rely on man for help in overcoming sin when man can only point you to God if you truly want to be purged from sin. My friend, stop relying on man to help you and realize that only God can help you. Stop thinking you are strong enough to overcome sin and realize you are helpless without God.
These four steps are necessary for God to purge your sin from your life. Each step brings you to the next step. It all starts with seeing a holy God. When you get to the final step when you see your helplessness, it is then that God steps in and purges your sin from you. Always remember if you want complete victory from any particular sin, then it is going to take God’s help.