Amen (ah-men), Aum (Om), Ammon
In Revelation 3:14, Jesus calls himself, “the Amen, the faithful and true witness.”
From The Global Oneness Commitment: “In Hebrew, Amen is formed of the letters A M N = 1,40,50 =91,and is thus a simile of “Jehovah Adonai”=10, 5, 6, 5 and 1,4, 50,10 =91 together; it is one form of the Hebrew word for “truth”. In common parlance Amen is said to mean ‘so be it‘.
But, in esoteric parlance Amen means ‘the concealed.’ Manetho Sebennites says the word signifies that which is hidden and we know through Hecateus and others that the Egyptians used the word to call upon their great God of Mystery, Ammon (or “Ammas, the hidden god “) to make himself conspicuous and manifest to them.
Bonomi, the famous hieroglyphist, calls his worshippers very pertinently the ‘Amenoph,’ and Mr. Bonwick quotes a writer who says: “Ammon, the hidden god, will remain for ever hidden till anthropomorphically revealed; gods who are afar off are useless”. Amen is styled ‘Lord of the new-moon festiva.’ Jehovah-Adonai is a new form of the ram-headed god Amoun or Ammon (q.v.) who was invoked by the Egyptian priests under the name of Amen.”
From The Global Oneness Commitment: “Amen (Hebrew) (from ‘aman‘ to be firm, faithful, trustworthy, sure). Firmness, permanency, durability, truth, fidelity; as an adverb truly, certainly, verily, so be it.
The significance of amen is in many cases almost identic with that of the Sanskrit Aum (Om). For this reason in Christian prayers or church services it has been adopted as the final word closing a prayer — another usage closely similar to the way in which Om is used in Sanskrit writings. In later Gnostic times Amen was one of the angelic host.
In ancient Egypt one of the great gods was called Amen or Ammon”
From Jade Dragon:
“Aum (Om) in ancient Egypt: It seems that the ancient Egyptians knew of Aum as Amen or Amun. Amen-Ra was the name of the supreme God who was considered the primordial creator and ruler of the other gods which have no beginning and no end.
Om in Ancient Greece: The ancient Greek alphabet had Omega as its last letter. Omega written in the lowercase of the Greek alphabet, if turned to its side, looks quite similar to the Sanskrit way of writing Om. It is from the Greek alphabet “Omega” that we have the English phrase “the Alpha and Omega,” which means, “to include everything.”
“In the beginning was the Word and the Word was with God and the Word was God. Amen.”
Om in Judaism and Christianity: Indian mystical thinking influenced Judaism in many ways. Scholars believe Aum (Om) became Amen and, as such, was later incorporated into Christianity. Amen is said to mean “so be it”, though this may be a later interpretation. Amen is widely mentioned in the Bible. It is used during worship (Revelations 3:14) as an expression of benediction (1 Chronicles 16.36), for expressing one’s love of God (2 Corinthians 1:20), or as sign of gratitude.”
The modern Christian use of ‘Amen‘ as ‘so be it,’ was first recorded about 1230 A.D. Source: The Online Etymology Dictionary