Shaykh ul-Islām ibn Taymiyyah [may Allāh have mercy on him] said: “No one is ever permitted to despair of Allāh’s mercy, no matter how immense their sins may be.” Majmū‘ al-Fatāwa, 16/19-20 | Shaykh ul-Islām ibn Taymiyyah, [may Allāh have mercy on him]  Translation: Authentic Quotes