The art of True Light is a practice to purify one's spiritual aspect as an expedient toward attaining happiness. Radiating Light from the palm of the hand is a method of purification that cleanses the spirit, mind and body, and is said to help open the way to resolving all manner of problems. Okada spent much of his time in the early days of the organization giving Light to people throughout Japan. In 1973, he visited Europe, and the art of True Light started spreading throughout the world.