that is because those who refuse to believe only follow what is false but those who believe follow the truth from their lord. that is how god gives men precepts of wisdom.
ذلك بأن الذين كفروا اتبعوا الباطل وأن الذين آمنوا اتبعوا الحق من ربهم كذلك يضرب الله للناس أمثالهم