In the poetic gathas and ancient Zoroastrianism, the highest heaven is a house or abode of music and songs called garö demánæ.
Avestan garö…dá, Vedic gìras …dhā, reconstructed Indo European grh-dh-o all refer to “melodious singing and musical harmony of song.” Compare with Lithuanian gìrti “praise.”
Dá or dhā means to “create, set in place, establish!”
Also, Avestan demánæ, Greek dōm, Latin domus, Vedic dām, Proto Indo European *dóm(h)os derived from the verbal root *dem(ha) “to build,” all mean “house, abode.”
The proto Celtic bardos, Welsh (bardd,) Irish and Welsh words for BARD all come from the same ancient root of grh-dh-o “create music/songs.”
Zoroastrian devotion is NOT slavery to a despotic God and heaven in the ancient Iranian religion is NOT an endless hedonistic party!!! The highest heaven or garö demánæ is a house of melody, song and creation.
Mazdá, the highest god is one who creates, establishes through mind-power, spirit, brilliance, world-order. Mazdá propounds themes of music/creation to god-men in the house of song, unfolding to them each time melodies greater and more amazing than before. For the brilliant thoughts of Mazdá is awakened into music and songs.
In garö-demánæ, Immortals and god-men make in harmony together new themes of music and song for the creation of new worlds, each time better and more amazing.
For mortal men are akin to god-beings and Immortals if they realize their full potential as co-workers of the god force.
In Zoroastrianism, there is kinship between unlimited Immortals and high-minded mortals. This kinship rests above all on the view that Gods and men are bound through truth, goodness, excellence and virtue.
In the poetic gathas and Zoroastrian religious poetry God is again and again equated to the natural law and reason.
The highest heaven or garö demánæ represents this timeless ordering of the worlds, into which the god-men have harmoniously fit themselves as the co-creators of the supreme God and other Immortals.
Hermann Lommel, in Zarathustra und seine Lehre, speaks of a “harmonious ordering of the worlds”, which the ancient Iranians are said to have represented.
The nature of god-beings or ahûrás is connected with the world order, melody and brilliance. Mortal man must join in with the ahûras in the struggle against all degeneration and chaos, hence ESTABLISHING, CREATING an ever better, more wondrous and harmonious worlds and order.
I shall conclude with the 2nd rhymed verse line of Yasna 51.15 of the poetic gathas:
garö demánæ ahûrö mazdáv jasat poûruyö
The abode of music/songs of the ahûrás wherein Mazda (god of mind-power, thoughts, creativity) came as first/foremost!