"Human beings undergo psychological development. At each level or stage of development, they will see the world in a different way. Hence, each level of development has, as it were, a different religious belief or worldview. This does not make God or Spirit the result of human development; it does, however, make the ways in which humans conceive of God or Spirit the result of development. And this is where it gets really interesting."
— Ken Wilber, "Which Level of God Do You Believe In?" (Beliefnet Essay 3)

In his essay entitled "
Which Level of God Do You Believe In?",
Ken Wilber shares some of his thoughts on the process of psychospiritual growth and provides a summary of the model created by the consciousness theorist
Jean Gebser, which proposes five distinct levels of development: an archaic spirituality, a magic spirituality, a mythic spirituality, a mental spirituality, and an integral spirituality.