Allah the Almighty said; “And We send down of the Quran, that which is a healing and a mercy to the believers, and the unbelievers it causes not except loss.” (17: 82)
Quran restores soul calmness:
The results of researches conducted over a group of volunteers from USA who were subject to a recitation of the Holy Quran were striking. A trace of a tranquilizing effect was recorded at a whole rate of 97%. Although many of these volunteers do not know Arabic, yet involuntary physiological changes that led notably to alleviate the acuity of tension they had before were observed in their nervous systems. Furthermore, an experiment of EEG during Quran rehearsal revealed that while listening to Quran, the encephalic waves moved from the fast pattern of vigilance (12-13) wave/ second to the slow pattern (8-18) wave/ second; indicating the state of deep calmness. Non-Arabic speaking persons felt reassured, quiet, and complacent during the process of listening to Quranic verses, in spite of their inability to understand the meanings. This is one of the miracles of the Holy Quran. The Prophet revealed that miracle when saying;
“No people assembled in one of the houses of Allah (mosques), and recite and study the Book of Allah (among themselves), except that tranquility would prevail over them, and mercy would encompass them, and the angels would surround them, and Allah would make a mention of them in the presence of those near Him.”
A healing from diseases:
It is commonly known that Quran removes the causes of tension and cover the soul with tranquility and complacency. But was that effect of Quran limited to the souls only? When Allah says; “And We send down of the Quran, that which is a healing and a mercy to the believers..” (17: 82),
Then how could the Quran be a healing for the bodies? It is medically asserted that tension and worries lead to a deficiency in the immunity of human body in the face of all diseases. The more the psychological and nervous condition of man is not stable, the more the chances to face the invasion of diseases. Hence, the explanation becomes crystal clear- the Quran is a healing for bodies as it is a healing for the souls and spirits. The Quran regains the balance of nervous and psychological systems for the believer who constantly recites and listens to it, and contemplates its meaning, thus leading to increase his bodily immunity and safeguard his internal defenses. Man becomes in constant safety against the penetration of diseases. With the Quranic prevailing luminous powers, all microbes and germs attacking the body in consecutive waves are resisted.
Dr. Ahmed El Kadi conducted a research in USA on three groups of Americans who do not speak or understand Arabic. He connected them to instruments for measuring biomedical functions such as blood pressure, heart pulses, EEG, myography, and sweat test. He recited some Quranic verses for the first group, and ordinary sentences of everyday Arabic for the second group while the third group was a control group resting in a state of relaxation. He found that the physiological changes for the first group listening to Quran recitation have more significantly improved than the other two groups (These results were announced by the Islamic Organization for Medical Science).
Verily said the Almighty Allah; “If We had sent down the Quran upon a mountain, you would have seen it humbled, split asunder out of the fear of Allah. And those similitude- We strike them for men; haply they will reflect.” (59: 21)
“Medical Miracales of the Quran” – Dr. Sharif Kaf Al-Ghazal. The Islamic Foundation, UK. p. 104-105.