This quote eloquently encapsulates a profound shift in human consciousness brought about by space exploration, particularly the Apollo moon missions. Before the moon walk, many religious and cultural narratives depicted the earth and heavens as separate realms — the earth as a terrestrial, often imperfect domain, and the heavens as a sacred, distant expanse where divinity resided. The "religious myth" Joseph Campbell refers to represents this deep-rooted conception that sustained many societies' understanding of cosmic order and spiritual geography.

The physical act of astronauts walking on the moon and witnessing the earthrise from lunar orbit shattered these dichotomous perceptions. Suddenly, the earth was no longer perceived as a separate, isolated world beneath the celestial heavens; it became visibly part of the cosmic whole — literally "in the heavens." This powerful, tangible realization challenges and transforms traditional religious metaphors, making them less tenable in the face of empirical experience. It symbolizes a convergence of spiritual insight and scientific discovery, demonstrating how myths evolve as human understanding expands.

From a broader perspective, this quote reflects on how technological advancements compel humanity to reevaluate its place in the universe. It urges a movement away from rigid mythologies that divide reality into dualities, towards a more unified and integrated worldview recognizing the interconnectedness of all things. Campbell’s insight encourages us to adapt our metaphors, values, and spiritual frameworks to honor not only ancient wisdom but also the revelations science affords us, fostering a more holistic comprehension of existence.