12 Preface أَلا إِنَّهُم هُمُ المُفسِدونَ وَلٰكِن لا يَشعُرونَYusuf AliOf a surety, they are the ones who make mischief, but they realise (it) not1.Much mischief is caused (sometimes unwittingly) by people who think that they have a mission of peace, when they have not even a true perception of right and wrong. By their blind arrogance they depress the good and encourage the evil.