The Importance of Monotheism in the History of Islam

The monotheism settles the heart because it anchors you in the one who created you. Can you find a single prominent companion of the Prophet salallahu alayhi wasallam or any of the salaf who left this religion after tasting the sweetness of it? No. People do leave the religion but they don't leave the religion because of the religion. They're not leaving the religion out of displeasure with the religion.