A miracle is most commonly held to be the intervention by a supernatural being – usually a god – in the normal workings of the universe. Different religions, however, have substantially different notions of a miracle, and disagreements are also to be found within religions. The word "miracle" comes from the Latin miraculum meaning "something wonderful".
In casual usage, "miracle" may also refer to any statistically unlikely but beneficial event (such as survival from a natural disaster), or even to anything which is regarded as wonderful regardless of its likelihood or naturalness, such as childbirth.
On this view, a miracle is a violation of normal laws of nature by a god or some other supernatural being. Some scientist-theologians like Polkinghorne suggest that miracles are not violations of the laws of nature but "exploration of a new regime of physical experience".[1]
Some modern religious believers hold that there is a scientific basis for believing in supernatural miracles. They hold that in the absence of a plausible, parsimonious scientific theory, the best explanation for these events is that they were performed by a supernatural being, e.g. a god. Therefore, there is probably a supernatural being who performs what appear to be miracles. However, some scientists criticise this kind of thinking as a subversion, or perhaps deliberate misuse, of Occam's razor[2]
Many adherents of monotheistic religions assert that miracles, if established, constitute proof of the existence of an omnipotent, omniscient, and benevolent god. There are a number of criticisms of this point of view:
In rabbinic Judaism, many rabbis mentioned in the Talmud held that the laws of nature were inviolable, and thus the idea of contraventions of those laws was ruled out; at the same, however, time they affirmed the truth of the accounts in the Tanakh. Therefore some explained that miracles were in fact natural events that had been set up by God at the beginning of time.
In this view, when the walls of Jericho fell, it was not because God directly brought them down. Rather, God planned that there would be an earthquake at that place and time, so that the city would fall to the Israelites. Instances where rabbinic writings say that God made miracles a part of creation include Midrash Genesis Rabbah 5:45; Midrash Exodus Rabbah 21:6; and Ethics of the Fathers/Pirkei Avot 5:6.
This view is echoed in the writings of Thomas Aquinas, and even later in the theory of occasionalism.