In the 1970s he learned the meditation techniques of the Divine Light Mission's Guru Maharaj Ji, which Gallwey said enhanced his powers of concentration in a manner that improved his game.
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Groups, movements and individuals discussed in the book include UFO religions, Scientology, the New Age movement, Aum Shinrikyo, Meher Baba, Sufism, Children of God, Divine Light Mission, Deepak Chopra, Aleister Crowley, Werner Erhard, Erhard Seminars Training, and Landmark Forum, Falun Gong, Hare Krishna, Heaven's Gate, Peoples Temple, and many other groups.
In the late 1970s he wrote Youth, Brainwashing and the Extremist Cults, where he explored the dynamics of conversion and member participation through some case studies of various controversial minority religious groups such as: Hare Krishna (ISKCON), Children of God, Alamo Christian Foundation, the Love Family, the Unification Church, the Way International, and the Divine Light Mission.
Prem Rawat and the Divine Light Mission (Elan Vital) are considered to be part of the Sant Mat tradition by J. Gordon Melton, Lucy DuPertuis, and Vishal Mangalwadi, but that characterization is disputed by Ron Geaves.
He stated that Kent analyzed groups that have been referred to as both cults and new religious movements, including the Children of God, the Divine Light Mission, the Unification Church, the International Society for Krishna Consciousness, the Church of Scientology, Transcendental Meditation, and others.
Another description including the details of the four techniques of knowledge is provided by Dr. Daniel Kriegman who describes the recruitment process utilized by the Divine Light Mission in the early 1970's.