That being so, when the Jahmiyyah—whose underlying doctrine was negation and denial of the divine attributes—first emerged, they disclosed to people only those views that would provoke the least opposition. They openly declared that the Quran was created and that Allah cannot be seen. The issue of the Quran carried greater weight with them. Thus they succeeded in corrupting some of those in authority during the reigns of Abū al-ʿAbbās, known as al-Maʾmūn, and his brother Abū Ishāq al-Muʿtasim