Telling small lies could embolden a person to tell big ones and might lead to the sinful practice of lying. Little thefts could dull an individual’s conscience to the point that he begins to steal on a larger scale.
وَٱلسَّرِقَاتُ ٱلصَّغِيرَةُ يُمْكِنُ أَنْ تَجْعَلَ ضَمِيرَ ٱلْمَرْءِ فَاقِدَ ٱلْإِحْسَاسِ بِحَيْثُ يَبْتَدِئُ يَقُومُ بِسَرِقَاتٍ أَكْبَرَ .‏