Experience is the best teacher, and I have read many, many other anecdotes like this over the years. I hope you will take this cautionary tale to heart and learn your lesson from theirs:
"Then, I went out Saturday night and drank wine and I did it. I smoked a cigarette. Then, I smoked another. Probably 4 in all. I slipped. I relapsed. I failed."
Please don;t chance it. A quit is a terrible thing to lose.