Many folktales, religious texts, and people claim various events they refer to as "miraculous". There are no scientifically confirmed occurrences of miracles. Miracles are not subject to controlled experimentation and the mechanism of occurrence not recognized by the scientific community. One aspect of some miracles which makes them almost impossible to verify is the fact that they are often manifested only to small groups of individuals, and sometimes centuries ago.
People in different cultures have substantially different definitions of the word "miracle". Even within a specific religion there is often more than one of the term.
Sometimes the term "miracle" may refer to the action of a supernatural being that is not a god. Thus, the term "divine intervention", by contrast, would refer specifically to the direct involvement of a deity.
In casual usage, "miracle" may also refer to any statistically unlikely but beneficial event, (such as the survival of a natural disaster) or even which regarded as "wonderful" regardless of its likelihood, such as birth. Other miracles might be: survival of a fatal illness, escaping a life threatening situation or 'beating the odds'.
The logic behind an event being deemed a miracle varies significantly. Often a religious text, such as the Bible or Quran, states that a miracle occurred, and believers accept this as a fact. However, C.S. Lewis noted that one cannot believe a miracle occurred if one had already drawn a conclusion in one's mind that miracles are not possible at all. He cites the example of a woman he knew who had seen a ghost, who had discounted her experience; claiming it to be some sort of hallucination (because she did not believe in ghosts).
Many conservative religious believers 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, and cite this as evidence for the existence of a god or gods. However, Richard Dawkins criticises this kind of thinking as a subversion of Occam's Razor. Some adherents of monotheistic religions assert that miracles, if established, are evidence for the existence of an omnipotent, omniscient, and benevolent god.
A literal reading of the Tanakh shows a number of ways miracles are said to occur: God may suspend or speed up the laws of nature to produce a supernatural occurrence; God can create matter out of nothing; God can breathe life into inanimate matter. The Tanakh does not explain details of how these miracles happen.
Today many Orthodox Jews, most Christians, and most Muslims adhere to this view of miracles. For example, Christians say that when the Virgin Mary became pregnant, it was something her fiance Joseph understood to be remarkably unusual, because Joseph knew that it was impossible for a woman to become pregnant without having sex with a man. The Christians say that Joseph would have cancelled his wedding if an angel had not informed him about the miracle that had happened to Mary. This view is generally rejected by non-Orthodox Jews, liberal Christians and Unitarian-Universalists. Biblical stories are interpreted by some as allegory or using figures of speech: In this view the "miracle" in the story may not have been intended to be taken literally. For example, they say that the pregnancy of Mary was probably a reference to something like her "being pregnant with happiness" because of the upcoming wedding.
Many events commonly understood to be miraculous may not actually be instances of the impossible,as commonly believed. For instance, consider the parting of the Sea of Reeds (in Hebrew Yâm-Sûph; often mistranslated as the "Red Sea"). This incident occurred when Moses and the Israelites fled from bondage in Egypt, to begin their exodus to the promised land. The book of Exodus does not state that the Reed Sea split in a dramatic fashion. Rather, according to the text God caused a strong wind to slowly drive the shallow waters to land, overnight. There is no claim that God pushed apart the sea as shown in many films; rather, the miracle would be that Israel crossed this precise place, at exactly the right time, when Moses lifted his staff, and that the pursuing Egyptian army then drowned when the wind stopped and the piled waters rushed back in. Though this view is highly contended by more fundamental Christians who find it hard to believe that a "shallow" sea could drown an Egyptian Army with horses and chariots, contesting that it was a mighty miracle and an act of God on both sides of the crossing.
Most events later described as miracles are not labeled as such by the Bible; rather the text simply describes what happened. Often these narratives will attribute the cause of these events to God.
Jesus is recorded as having turned water into wine; creating matter out of nothing, and thus turning a loaf of bread into many loaves of bread; and raising the dead. Jesus is also described as rising from the dead himself, God his father having raised him. Jesus explains in the New Testament that miracles are performed by faith in God. "If you have faith as small as a mustard seed, you can say to this mountain, “move from here to there” and it will move." (Gospel of Matthew 17:20). After Jesus returned to heaven, the book of Acts records the disciples of Jesus praying to God to grant that miracles be done in his name, for the purpose of convincing onlookers that he is alive. (Acts 4:29-31). Other passages mention performing miracles as an identifying feature of a False prophet(Matthew 24:24, 2 Thes 2:9, Revelation 13:13)
In order to defend the possibility of miracles and God's omnipotence against the encroachment of the independent secondary causes, medieval Muslim theologians rejected the idea of cause and effect in essence, but accepted it as something that facilitates humankind's investigation and comprehension of natural processes. They argued that the nature was composed of uniform atoms that were "re-created" at every instant by God. Thus if the soil was to fall, God would have to create and re-create the accident of heaviness for as long as the soil was to fall. For Muslim theologians, the laws of nature were only the customary sequence of apparent causes: customs of God.
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.
In Numbers 22 is the story of Balaam and the talking donkey. Many hold that for miracles such as this, one must either assert the literal truth of this biblical story, or one must then reject the story as false. However, some Jewish commentators (e.g. Saadiah Gaon and Maimonides) hold that stories such as these were never meant to be taken literally in the first place. Rather, these stories should be understood as accounts of a prophetic experience, which are dreams or visions. (Of course, such dreams and visions could themselves be considered miracles.)
Joseph H. Hertz, a 20th century Jewish biblical commentator, writes that these verses "depict the continuance on the subconscious plane of the mental and moral conflict in Balaam's soul; and the dream apparition and the speaking donkey is but a further warning to Balaam against being misled through avarice to violate God's command."
The Catholic Church claims to have confirmed the validity of a number of miracles, some of them occurring in modern times and having withstood the test of modern scientific scrutiny. Among the more notable miracles approved by the Church are several Eucharistic miracles wherein the Sacred Host is transformed visibly into Christ's living Flesh and Blood, bleeds, hovers in the air, flies around, radiates light, and/or displays the image of Christ. The first example of the Host being visibly changed into human flesh and blood occurred at Lanciano, Italy around 700 A.D. Unlike some miracles of a more transient nature, the Flesh and Blood remain in Lanciano to this day, having been scientifically examined as recently as 1971.
Another miracle claimed valid by the Church is the Miracle of the Sun, which occurred near Fátima, Portugal on October 13, 1917. Anywhere between 70,000 and 100,000 people, who were gathered at a cove near Fátima, witnessed the sun dim, change colors, spin, dance about in the sky, and appear to plummet to earth, radiating great heat in the process. After the ten-minute event, the ground and the people's clothing, which had been drenched by a previous rainstorm, were both dry. There are numerous first-hand reports of the details from both religious and secular sources.
In addition to these, the Catholic Church attributes miraculous causes to many otherwise inexplicable phenomena on a case-by-case basis. Only after all other possible explanations have proven inadequate may the Church assume Divine intervention and declare the miracle worthy of veneration by the faithful (the Church does not, however, enjoin belief in any extra-Scriptural miracle as an article of faith or as necessary to salvation).
Some modern religious groups claim ongoing occurrence of miraculous events. While some miracles have been proven to be fraudulent (see Peter Popoff for an example) others (such as the Paschal Fire in Jerusalem) have not proven susceptible to analysis. Some groups are far more cautious about proclaiming apparent miracles genuine than others, although official sanction, or the lack thereof, rarely has much effect on popular belief.