Allah SWT says: أَلَآ إِنَّهُمْ هُمُ الْمُفْسِدُونَ وَلٰكِنْ لَّا يَشْعُرُونَ "Unquestionably, it is they who are the corrupters, but they perceive [it] not." (QS. Al-Baqara: Verse 12) * Via the Beautiful Qur'an https://goo.gl/QLwc8B