The term ‘miracle’ generally refers to events that are not explicable by natural causes alone. Kant’s notion of miracles is usually understood along these lines. However, Kant’s occupation with miracles should be understood in a practical context. Belief in miracles plays a constitutive role in Kant’s philosophy of religion concerning the need to strengthen the will both before and after departing from original evil. I demonstrate how my argument sheds new light on Kant’s claim that theoretical reason precludes the possibility of material miracles.