Manly P. Hall devotes this letter to Metaphysics, the first branch of philosophy, defined as the study of invisible causes behind visible nature. He contrasts physics—the study of the material world—with metaphysics, which investigates the unseen principles that animate all forms. Drawing on Aristotle, Pythagoras, Albertus Magnus, Xenophanes, and other ancient authorities, Hall explains that metaphysics concerns the nature of Being, God, Truth, Knowledge, Energy, Creation, and the relationship between the divine and human. He describes Being as the eternal, unchanging First Cause, manifesting through three modes: the Unmoved (God), the Self‑Moving (the gods or intelligences), and the Moved (all embodied creatures, including humanity). Ancient metaphysical traditions—Egyptian, Greek, Hindu—are cited to show that all great civilizations recognized a single supreme Principle whose attributes appear as a multiplicity of divine agencies.

Hall then argues that modern seekers must reclaim this metaphysical worldview to achieve genuine security, character, and wisdom. True metaphysics requires acknowledging the presence of divinity in every aspect of nature and recognizing that the universe is filled with intelligent principles—“the Heavenly Host”—whose operations sustain life. He clarifies misunderstood terms such as pagan and heathen, insisting that philosophers of antiquity were not idolaters but universalists who refused to limit the Divine Essence to sectarian definitions. Contemplating the transcendent order of Being elevates the mind, refines character, and provides a spiritual perspective capable of overcoming fear, ignorance, and narrowness. Hall concludes by preparing students for the next lesson, which will explore the nature of Knowledge and Truth, continuing the metaphysical foundation necessary for philosophical living.