Christianity
New Testament accounts of the advent, birth, life, Passion, and Resurrection of Christ include many miracles. Jesus is reported in the Gospels to have performed miracles of diverse kinds: raising the dead, healing the sick, casting out demons, and causing nature miracles, such as the multiplication of loaves and the turning of water into wine at the town of Cana. Unlike the Buddha and Muḥammad, Jesus had an ambiguous attitude toward miracles: on the one hand he performed them as a sign of his mission and of the impending coming of the Kingdom; on the other hand he reproved the desire for wonders and repeatedly forbade the disciples to publicize his miracles, insisting that it was faith alone that worked miracles. In fact, because miracles also could be explained by attributing them to demonic agency, it was ultimately faith that determined the quality and function of the miracle.
Early Christianity developed in the atmosphere of Hellenistic, Greco-Roman culture, which was full of miraculous accounts and legends. These no doubt influenced Christian traditions and forms of devotion, especially as popular religion always hankered after miracles, and—at the conclusion of the Gospel According to Mark—Christ himself had promised the continuance of miracles in his church. In a world in which only a few critical minds doubted the reality of miracles, the similarity of the Christian signs to those reported in pagan legend was attributed to demonic imitation and counterfeit. The problem of distinguishing between the two sources of miracles—because the devil often disguises himself as an angel of light—frequently solicited the attention of theologians and mystics. Whereas for the theologians a miracle was a sign of God’s saving presence and design, for the mass of believers it was the manifestation of a sacred power inherent in individual persons, places, and objects.
Medieval theologians—and specifically St. Thomas Aquinas—taught that as all knowledge was derived from sensible facts, so also “a certain degree of supernatural knowledge of the objects of faith” could be brought about “by certain supernatural effects that are called miracles.” This doctrine already assumes a system of natural causality that God—though he normally works through the natural law of which he is the author and Creator—can temporarily set aside. It also assumes that—at least in theory, if not always in practice—natural and supernatural effects can be distinguished. Thus, in 1870 the first Vatican Council declared: “If anyone should say that no miracles can be performed, . . . or that they can never be known with certainty, or that by them the divine origin of the Christian religion cannot be rightly proved—let him be anathema.” Belief in miracles is thus obligatory in the Roman Catholic Church, although belief in any specific miracle is not necessarily so. Classical Protestantism, however, has confined its belief in miracles to those recorded in Scripture.
Islām
Muslim religion assumes, as a matter of course, that Allāh works miracles and has done so in the past; e.g., through Moses, Solomon, and Jesus but significantly not through the Prophet Muḥammad. According to the Qurʾān, Muḥammad explicitly rejected the idea of proving his vocation by signs and miracles: the Qurʾān itself was the greatest miracle, and he was but a human messenger and preacher of repentance. Nevertheless, subsequent narratives invested his birth and life with superlatively miraculous details.
Muslim popular religion—particularly under Ṣūfī (Islāmic mysticism) influence—abounds in miracles, pilgrimages to the tombs of wonder-working saints, and the like. Dogmatic theology, too, recognizes miracles as facts. The peculiar feature of Muslim theology is that, unlike Christian theology, it did not accept the idea of nature as an entity operating according to fixed laws ordained by the Creator. Because the universe is constantly being re-created by Allāh in successive time atoms, natural regularity is nothing but the regularity of Allāh’s habit in re-creating the universe. Thus, a miracle is the omnipotent God’s departure from his habit but no different, in principle, from the latter. Muslim dogmatics distinguish between miracles (karāmāt), with which Allāh surrounds his saints (awliyāʾ) as a mark of distinction, and signs (āyāt, also muʿjizāt; literally, “acts of an overwhelming nature”). The latter are wrought by Allāh to prove the genuineness of his messengers and to overwhelm and reduce to silence their opponents. Such miracles, which deviate from the usual course of things and are of such nature that others cannot produce their like, are Allāh’s testimony to the sincerity of his apostles. The problem is nevertheless complicated by the fact that Satan too can perform miracles. Generally speaking, miracles do not play a role in the continued life of orthodox Islām, though they loom large in popular belief and piety.
Interpretation of miracles
All the more fully developed theologies have formulated a doctrine of miracles in the context of their beliefs regarding God, the world, the operations of nature, and causality. The emergence of the concept of nature as a closed system functioning in accordance with strict causal laws created problems more than once, but medieval Christian and Jewish thought had no difficulty in maintaining that the order created by God could also be suspended by him.