As an alternative or complementary therapy it is a mind-body process that can produce physical benefit from mental effort. There is scientifically-accepted evidence that the mind, in meditation, can effect physiologic changes in the human body. Meditation has been a part of religion and medicine since ancient times. Modern religions use meditation regularly as a means to come closer to God. Mental control is the basis of effective meditation.
Control is necessary if meditation is to be helpful.
The use of meditation in health care complements rather than replaces mainstream medical treatment. Its goal is to improve general health, to reduce the discomforts of illness, and to speed up the healing process. There are many schools of meditative thought or contemplation. Meditation cannot cure cancer and it cannot prevent cancer. But it can often help improve the quality of life of people with cancer.