How mentalism lights up those deeper and darker sayings of Jesus! "The kingdom of heaven is within you" is then seen to be both a joyful proclamation of spiritual hope and a statement revealing a little-known fact. It proclaims a heavenly existence as being within reach of the mind that is the real man and it tells of such existence being hidden within the mind itself. Heaven is then no far-off place or no post-mortem condition but a state attainable in this life.
-- Notebooks Category 21: Mentalism > Chapter 5: The Key To the Spiritual World > # 104