Dear Brother,
I am praying for you as I write. I also must confess that I am fighting temptation in my thought life, and it is a real battle! It has made me realize that I need to stay fettered to Christ, if not tucked in His bosom. Remember and believe: the Word of God is true; it is our hope and power as we trust in Christ. God's grace is sufficient! Believe it! His power is perfected in our weakness. Have you utterly forsaken your sin? (James 1:13-16) This we must do, and tell ourselves that we have indeed done this.
Wayneman gave some powerful scripture to consider. Are you keeping your eyes on Jesus? Also, I agree with Wayneman, Romans 6-8 is a great suggestion for study.
I listened to Paris Reidhead's sermon on Temptation and Sin just this week. I think it is number 7 in the series "So Great a Salvation". This message should help you understand what you are up against in this time of testing. It was of great help to me, and I should listen to it again.
Paris Reidhead reminds us that when we are saved, we bring with us our appetites (which, as given to us by God, are neutral/good--but Satan uses his wiles and our weakness to pervert them). We also bring old habits; these must be utterly forsaken--nailed to the Cross of Christ; you must replace them with godly/Christ-honoring habits and practices.
Please, please, take the time to listen to this message on sin and temptation, and take notes! Also, get on your face and ask God to open your heart to hear the message.
Two definitions from the sermon:
Temptation: a proposition or idea presented to the mind to gratify a good appetite in a bad/forbidden way.
Sin: the decision of the will/heart to gratify a good appetite in a bad/forbidden way.
He also gives the five effects of unconfessed/unforsaken sin, and they are not desirous!
Keep trusting Christ. Put off the old man and put on the new man. Stay in the Word. I exhort and encourage you to slay the lust and have victory in Jesus Christ.
We are all facing temptation at every turn; sin is crouching at the door, and its desire is to have us, but through Christ, we can overcome temptation--and He will provide a way of escape--ask God to show you the way out. 1Cor10:13; 2Tim2:21-22; Jude 24
Stay strong in the Lord. Let us pray for one another.
(Edited for clarification and out of obedience to the leading of the Spirit: that I confess my own weakness and struggles with this brother)