About the nature of spirit, matter and energy.

The meaning and the history of Reiki:

Thousands of years ago, Tibetans had a deep understanding of the nature of spirit, matter and energy. They used this knowledge to heal their bodies and harmonize their souls. The ancient art of healing was developed in the middle of the 19th century by Dr. Mikao Usui (August 15, 1865 – March 9, 1926) rediscovered and revived.

Dr. Usui traveled extensively, earned a doctorate in theology in Chicago and studied the sacred texts, Sanskrit, in India. He then returned to Japan. His goal has always been to make Reiki accessible to everyone. It is said that he trained 2,000 students and 16 teachers. (cf. Reiki, universal life energy)
There are numerous other teachers who have passed on the teachings of Reiki to this day.