You are not a human being having a spiritual experience. You are a spiritual being having a human experience.

Wayne Dyer (1940-2015) American self-help author, motivational speaker

You’ll See It When You Believe It: The Way to Your Personal Transformation, ch. 2, epigraph (1989)
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A variant of the phrase is also included in the Introduction to the book: "That you are not a human being having a spiritual experience, but rather a spiritual being having a human experience."

Dyer originally used a variation of this ("Can you see yourselves as spiritual beings having a human experience, rather than human beings who may be having a spiritual experience?") the previous year in "A Letter to the Next Generation," an advertisement by Volkswagen.

Also attributed, without citation to Pierre Teilhard de Chardin (incorrectly) and Georges I. Gurdjieff.

More discussion: You Are Not a Human Being Having a Spiritual Experience. You Are a Spiritual Being Having a Human Experience – Quote Investigator.