If a wicked man can become a pure religious man, this according to Buddhism, is a practical miracle.
In every religion we hear of miracles being performed by either the founders of these religious or by some of their disciples. In the case of the Buddha, he performed what people would call miracles on the day of his birth until his passing away into Nirvana. The psychic powers (so-called miraculous powers in other religions) of the Buddha were attained through his long and intense training in meditation. The Buddha meditated and passed through the highest stages of meditation that culminated in Enlightenment. Among his many abilities were the power to levitate, to multiply his body, to read the minds of others, to pass through solid rock and such. These abilities were performed during many episodes of his life and were considered common events by his disciples and those who encountered him. The Buddha taught that such powers can be acquired through training in meditation. They are not considered miracles by those who understand them and they fall within the ability of any person who trains his mind through meditation and mental concentration to very high levels.
Once a man named Kevatta went up to the Buddha, paid homage, and said, “Lord, Nalanda is a successful city. The people living in Nalanda are prosperous, and they have confidence in the Blessed One. Lord, it would be good if the Blessed One appointed a monk to work a marvel of supernormal power, so that the people of Nalanda might become much more confident in the Blessed One.”
The Buddha replied, “Kevatta, I do not teach the Law to monks in that way”. The Buddha gave the same reply when the question was put to him the second and third time. After the third question, the Buddha replied that there were three kinds of supernormal levels:
1. The marvel of supernormal power to appear as many persons, to pass through walls, to fly through the air, walk on water. All these are physical actions the ordinary people cannot perform.
2. The supernormal power to read other people’s minds.
3. The supernormal power to be able to guide people according to their mental development, for their own good, using suitable methods that fit these people.
He taught that a monk who displays the first two supernormal powers for their own sake in order to impress people, is no different from the performance of a shaman or a magician. The Buddha said that a monk who practices such worldly miracles is a source of shame, humiliation and disgust. This is because such actions may impress and win converts and followers, but they do not help them put an end to their suffering.
The third kind of supernormal power which the Buddha calls “the miracle of instruction” helps people to get rid of suffering. This is the only supernormal power that is fit to be practiced and is encouraged and praised by the Buddha.
Another story illustrates the Buddha’s attitude towards miraculous powers. One day the Buddha met an ascetic who sat by the bank of a river. This ascetic had practised austerities for 25 years. The Buddha asked him what he had received for all his labour. The ascetic proudly replied that, finally, he could cross the river by walking on the water. The Buddha pointed out that this gain was insignificant for all the years of labour, since he could cross the river using a ferry for one penny!
When the uneducated, the unsophisticated and the naive see the performance of miracles, their faith and incredulity deepens. The converts who are attracted to a religion through witnessing these powers embrace a faith, not because they realize the truth or gain in wisdom, but because they are either frightened or impressed by matters they do not understand. In contrast, the Buddha appealed to the reasoning power of people to consider his teachings. This is best illustrated in the Kalama Sutta.
From the article What About Miracles