In this article it is argued that the Qur’an’s doctrine of divine mercy is best understood in light of its pessimistic anthropology, an aspect of the text that is often underappreciated. The so-called “primordial covenant” verse (Q 7:172) of the Qur’an holds humans responsible for submission to God. The Qur’anic language on “signs” in the natural world suggests that humans should recognize God (and be grateful to Him) by reflection on nature alone. Yet, according to the Qur’an they do not. The Qur’an refers frequently to humans as “ungrateful” and “hasty”. It also makes divine punishments a regular element of human history, suggesting that rebellion is endemic to human nature. It is, I argue, precisely the rebelliousness of humans that makes God’s initiative in sending prophets merciful. The ministry of prophets in the Qur’an is an unmerited manifestation of divine compassion for a sinful humanity.