The concept presented in Arthur Edward Waite's "Pictorial Key to the Tarot" reflects the idea that a true appreciation of the universe involves a sense of wonder and spirituality. The quote "the undevout astronomer is mad" suggests that an astronomer's understanding of celestial phenomena should inspire awe, implying that a lack of reverence for the cosmos indicates a disconnect with the deeper meanings of existence.

This perspective highlights the intersection of science and spirituality, urging individuals to recognize the profound beauty in the mysteries of the universe. The poetic expression emphasizes that knowledge alone, without a sense of wonder, can lead to a narrow and potentially misguided view of reality, thus encouraging a holistic approach to understanding both the tangible and intangible aspects of life.