"Pax Deorum" is Latin for "Peace of the Gods" and features Enya playing the cello and violin, instruments that she had not fully learnt but can play basic chords that to her sounded effective when Nicky layered them in the studio with her synthesisers. While working on the track in its early stages during the Christmas 1994 period, the song took a direction that Enya and Nicky were not happy with, so they left it for up to three months before they revisited it, readjusting its basic theme in the process. When Enya played the song to Roma, it was clear to them that the song suited a language other than English, and decided Latin, at Roma's suggestion, for its "classic feel". Regarding the Irish language song "Athair Ar Neamh", which translates as "Father in Heaven" in English, Roma wrote "The voice of epiphany is found in 'Athair ar Neamh'. It is the voice of day, the voice of night, the voice of all, of understanding ... a peace which is unique to the individual, a peace that is felt rather than described".