O wretched man that I am! who shall deliver me from the body of this death? I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin. -Romans 7:24-25

Ah! how often will our imagination paint sin in very glowing colours, and though we loathe the sin and loathe ourselves for thinking of it, yet how many a man might say, “Had it not been for divine grace, my feet had almost gone, my steps had well-nigh slipped.” How strong is the evil in the best man, how stern is the conflict to keep under the body, lest corruption should prevail! You may be diligent in secret prayer, and perhaps the devil may have been asleep till you begin to pray, and when you are most fervent then will he also become most rampant. When you get nearest to God, Satan will sometimes seem to get nearer to you…Oh! this flesh, this body of this death-wretched man that I am, who shall deliver me from it?

If you want to go back to sin, to carnality, to a love of the world, to your old condition, you never need to be prevented from doing so by want of opportunities. It will be something else that will prevent you, for these opportunities are plentiful indeed.
Opportunities to return are often furnished by the examples of others.

“When any turn from Zion’s way,
Alas! what numbers do!
Methinks I hear my Saviour say,
Wilt thou forsake me too?” 

~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3478.cfm