The Eagle is the symbol of the so-called "Tribe of Manasseh," named after a son of Joseph, the pharaoh's dream-analyst, and man with the "coat of many colors" (zodiac). In reality Joseph was Yuya, the wealthiest man in the world during the time of the Pharaoh Tuthmosis IV. Yuya held the highest office, and was probably connected to the Hyksos Kings of Egypt. He was one of 12 "Brothers," that is a cryptic reference to his priestly (masonic) rank. He was second in command after the pharaoh of his time. In Egyptian and Hindi the word Akha (Akhe-naton) means "Eye." The hierogram for the word Akhem or Akha was an eagle. The eye and the eagle are therefore closely related and have long been symbols for royalty, especially Egyptian royalty. The name Akhenaton means the Eye of Aton. Manasseh is, therefore, a cover term and idea for the Atonists, and their conquest of America.
[...] the eagle (and also hawk or falcon) became the prime insignia of the gods.
In mysticism the eagle is a symbol of initiation (the spinal Spirit Fire)
As the royal bird of Rome, and the embodiment of deified emperors, the eagle was worshipped by Roman legionaries. Each legion had its sacred eagles, carried into battle like banners. If a legion should lose its eagles, the disgrace was unbearable; another whole expedition might be mounted to recover them.
The Roman imperial emblem was inherited by the Germanic "Holy Roman Empire" and its Kaisers, derived from Caesars. Thus the eagle became a Teutonic symbol of sovereignty.
The eagle was often identified with the fire bird or phoenix, who underwent a baptism of the fire that "burns all sins" and was reborn from his own ashes. The eagle also stood for the soul of Heracles, who passed through fire into heaven at seasonal festivals of Tarsus, and inspired St. Paul's belief in the virtue of giving one's body to be burned (1 Corinthians 13:3). The eagle was the totemic form of Prometheus, who "stole" fire from heaven, like the eastern fire-lightning-sun hero, man, or angel embodied in the Garuda bird. Garuda flew to the mountain of paradise to steal the gods' secret of immortality. Later, he assumed the golden body of the sun. American Indians had a similar hero, the thunderbird or lightning bird.
Classic soul-bird, symbol of apotheosis associated with the sun god, fire, and lightning. Greeks thought eagles so closely akin to the lightning spirit that they nailed eagles to the peaks of temples to serve as magic lightning rods. Hence the name aetoi, "eagles," for the pediments of Greek temples. These were ancient forerunners of the "weathercock" on the rooftree of a barn or house.
The eagles of Napoleon and Cæsar and the zodiacal eagle of Scorpio are really phœnixes, for the latter bird--not the eagle--is the symbol of spiritual victory and achievement. Masonry will be in a position to solve many of the secrets of its esoteric doctrine when it realizes that both its single- and double-headed eagles are phœnixes, and that to all initiates and philosophers the phœnix is the symbol of the transmutation and regeneration of the creative energy--commonly called the accomplishment of the Great Work. The double-headed phœnix is the prototype of an androgynous man, for according to the secret teachings there will come a time when the human body will have two spinal cords, by means of which vibratory equilibrium will be maintained in the body.
Among the Greeks and Romans, the eagle was the appointed bird of Jupiter and consequently signified the swiftly moving forces of the Demiurgus; hence it was looked upon as the mundane lord of the birds, in contradistinction to the phœnix, which was symbolic of the celestial ruler. The eagle typified the sun in its material phase and also the immutable Demiurgic law beneath which all mortal creatures must bend. The eagle was also the Hermetic symbol of sulphur, and signified the mysterious fire of Scorpio--the most profoundly significant sign of the zodiac and the Gate of the Great Mystery. Being one of the three symbols of Scorpio, the eagle, like the Goat of Mendes, was an emblem of the theurgic art and the secret processes by which the infernal fire of the scorpion was transmuted into the spiritual light-fire of the gods.
The Eagle signifies "A" - the first letter of the Egyptian, Celtic, Hebrew and Greek alphabets
The eagle evolved from the symbol of the phoenix, the sacred Sun bird of the ancient Egyptians and Phoenicians and the Native American version is the thunderbird. Manly P. Hall says that the original seal included the phoenix and it is known that one design for the Great Seal submitted by William Barton in 1782 included a phoenix sitting on a nest of flames.