The eagle holds a commanding position in both classical mythology and alchemical symbolism. In Greek tradition, the eagle is the bird of Zeus, bearer of thunderbolts and transporter of Ganymede to Olympus. The eagle's capacity for high flight, its sharp vision, and its association with celestial power made it a natural emblem for the volatile, ascending spirit in alchemy. In the Roman tradition and in Christian iconography, the eagle became associated with spiritual ascent, renewal (the eagle was believed to renew its youth by flying toward the sun), and the evangelist John.

In the alchemical tradition, the eagle represents the volatile, spiritualized aspect of mercury. Abraham identifies the eagle with the white tincture, white mercury, and virgin's milk. Lancelot Colson's Philosophia maturata refers to the white water as "our white tincture, our Eagle, our white Mercury, and Virgin's milk." The eagle is frequently paired with the lion to demonstrate the transformation from one stage to the next: the winged eagles devour the wingless lion, signifying the solve aspect of the work, the dissolution of fixed matter by the volatile spirit. The eagle is also paired with the toad, the earthly fixed substance: alchemists instruct the adept to join an earthly toad with a flying eagle, signifying the sublimation of the fixed earth by the volatile spirit.

Maier deploys the eagle in Emblem XLVI, which addresses the meeting of two eagles sent from East and West. The discourse draws on the myth of Jupiter dispatching two eagles from opposite ends of the earth to determine its centre, where they meet at Delphi and a golden eagle is erected as a monument. Maier applies this cosmological image to the alchemical work: the two eagles represent the two stones, the red from the East (sulphur) and the white from the West (mercury), which must converge at the centre, the point of conjunction. The eagle also appears implicitly in Emblem VII, where the wingless and winged bird represent the same contrast between fixed and volatile that the eagle and toad embody in other traditions. In the discourse to Emblem XLIII, the philosophical bird that builds its nest on high mountains is described with the properties of both vulture and eagle, able to fight the Mercury serpent and conquer it.

De Jong identifies the two eagles of Emblem XLVI with the two stones described in the Consilium Conjugii: the white stone that appears in the West above the waters and the red stone that rises in the East. She traces Maier's use of the Delphi myth to the broader theme of finding the centre, a motif connected to John Dee's Monas Hieroglyphica and the symbol of the circle whose centre represents God. De Jong notes that East and West carry cosmological meaning rooted in sun-cult traditions: the world originated from East to West, sun and life dawn in the East and set in the West, connecting the eagle's flight to the fundamental rhythm of creation and dissolution.

The eagle's appearance in the Atalanta Fugiens invites the reader to look upward, to follow the volatile spirit in its ascent and understand that what rises must eventually descend, that the high-flying eagle must be clipped of its wings and fixed. Maier's ludic method transforms this chemical instruction into a mythological quest: two eagles racing from opposite ends of the earth, meeting at the sacred centre where the golden monument stands. The reader who solves this puzzle grasps the essential paradox of the work: that the Stone is found not at one extreme but at the meeting point of contraries.

Meanings Across Registers

De Jong shows that alchemical terms operate simultaneously across material, medical, spiritual, and cosmological dimensions.

Alchemical

The volatile principle in its ascending phase: the eagle that flies up the alembic, distilled spirit rising from the calcined body—paired iconographically with the toad or lion of fixity.

Medical

The sublimated vital spirit (spiritus animalis) raised from the gross humors; the refined pneuma that medicine seeks to extract and re-administer as quintessential remedy.

Spiritual

The soul's upward flight in contemplation; the visionary capacity that, lifted on hot drafts, perceives from above what the earthbound understanding cannot.

Cosmological

The sign of Jupiter's bird and of the air-element; the celestial messenger whose ascent and descent figure the vertical traffic between heaven and earth.