Why this rather than gritting your teeth
The verse first, because it speaks directly to the belief that you have been handed something impossible and have already failed it. Then the treatment approach that works on your relationship to the urge and to your own self judgement, rather than on eliminating the urge, which is the opposite of what a counter does.
Qur’an and Sunnah
لَا يُكَلِّفُ ٱللَّهُ نَفۡسًا إِلَّا وُسۡعَهَاۚ لَهَا مَا كَسَبَتۡ وَعَلَيۡهَا مَا ٱكۡتَسَبَتۡۗ رَبَّنَا لَا تُؤَاخِذۡنَآ إِن نَّسِينَآ أَوۡ أَخۡطَأۡنَاۚ رَبَّنَا وَلَا تَحۡمِلۡ عَلَيۡنَآ إِصۡرࣰ ا كَمَا حَمَلۡتَهُۥ عَلَى ٱلَّذِينَ مِن قَبۡلِنَاۚ رَبَّنَا وَلَا تُحَمِّلۡنَا مَا لَا طَاقَةَ لَنَا بِهِۦۖ وَٱعۡفُ عَنَّا وَٱغۡفِرۡ لَنَا وَٱرۡحَمۡنَآۚ أَنتَ مَوۡلَىٰنَا فَٱنصُرۡنَا عَلَى ٱلۡقَوۡمِ ٱلۡكَٰفِرِينَ
God does not burden any soul with more than it can bear: each gains whatever good it has done, and suffers its bad- ‘ Lord, do not take us to task if we forget or make mistakes. Lord, do not burden us as You burdened those before us. Lord, do not burden us with more than we have strength to bear. Pardon us, forgive us, and have mercy on us. You are our Protector, so help us against the disbelievers.’
Qur’an 2:286
Translation: M.A.S. Abdel Haleem, The Qur'an, Oxford University Press, 2004.
What the research says
Twohig MP, Crosby JM (2010). Acceptance and commitment therapy as a treatment for problematic internet pornography viewing. Behavior Therapy, 41(3), 285 to 295 doi
A small trial of acceptance and commitment therapy for this specific problem, reporting reduced viewing. It is small, and no effect sizes are printed here because none were read off the paper in the research behind this course, so take the direction of the result rather than a number. What matters for this lesson is the approach. It works on how a person relates to an urge and to their own judgement of themselves, rather than on trying to delete the urge.