Hazrat Shaikh Moulana Muhammad Zakariyya (rahmatullahi ‘alaih) once mentioned:

The environment in certain places is extremely dangerous to one’s imaan. In such environments, it is necessary for one to guard his gaze from sin at all times. When a person misuses his eyes and looks at haraam, then the first effect of this sin is that he no longer perceives the motivation and enjoyment in his ‘ibaadah. The second effect of this sin is that his ‘ibaadah begins to decrease. The third effect of this sin is that a person becomes inclined towards sins and thereafter falls deeper into committing evil deeds. May Allah Ta‘ala protect us all from the evils and harms of environments where sin takes place. (Qutbul Aqtaab Hazrat Shaikhul Hadeeth Moulana Muhammad Zakariyya [rahmatullahi ‘alaih] pg. 411)

Source: Ihyaauddeen.co.za