Temptation

Temptation is a desire to engage in short-term urges for enjoyment, that threatens long-term goals. In the context of some religions, temptation is the inclination to sin. Temptation also describes the coaxing or inducing a person into committing such an act, by manipulation or otherwise of curiosity, desire or fear of loss.

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Amina Inloes, Amina Inloes is originally from the US and has a PhD in Islamic Studies from the University of Exeter on Shi'a hadith. She is the program leader for the MA Islamic Studies program at the... Answer updated 10 months ago

It tends to be a big challenge for people, especially in youth. Often, as people get older, that particular temptation becomes less, and other temptations come to the forefront. (Exceptions apply!)

However, although that is a common temptation, there is no one single challenge that everyone faces equally - our temptations are as diverse as ourselves. Possibly, your brother is going through a difficult time managing this aspect of himself, and this is why he said that. 

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Sayed Mohammad Saleh Qazwini, Sayed Mohammad Saleh Qazwini has a BA from the University of Michigan and an MA from Wayne State University. He is a graduate of the Islamic Seminary of Qom, Iran. Answered 7 years ago

This is a verse in the Quran. (Quran 2:191)