title is sung by a choir, who are not credited on the album sleeve. The narration reflects a spirit of countercultural optimism, speaking of "The day young boys will stop becoming soldiers/And soldiers will stop playing war games". "The Four Horsemen" deals with the Four Horsemen of the Apocalypse, its lyrics mostly paraphrasing the text of Revelation 6. The song's structure is marked by a dynamic contrast, with Roussos singing over an echoed keyboard drone and wind chimes in the verses, and the chorus containing traditional rock instrumentation highlighted by Sideras' drumming. The song culminates in a two-minute wah guitar solo by Koulouris over heavy drumming by Sideras and a repeated "fa fa fa" background chant by Roussos. One of the best known songs of 666, "The Four Horsemen" influenced Beck's "Chemtrails", which has a similar structure, and The Verve's "The Rolling People", which quoted the "fa fa fa" chant. The chorus was also sampled, in a slowed-down fashion, on Daniel Lopatin's "A7", from Chuck Person's Eccojams Vol. 1. "The Lamb" is a world music-influenced instrumental, featuring vocal chants following the main melody, and sounds reminiscent of traditional Greek instruments. "The Seventh Seal" is an instrumental with a repeated keyboard and string instrument melody, and British-accented narration by John Forst describing the lamb opening the last of the Seven seals, again based on Revelation 6. The narration does not mention the earthquake that the Book of Revelation attributes to the breaking of the sixth seal, but is otherwise faithful to the biblical description. Forst's line, "And when the lamb opened the seventh seal, silence covered the sky" was sampled in the Enigma song, "The Rivers of Belief". Side two Side two begins with "Aegian Sea", an instrumental featuring another lengthy guitar solo by Koulouris, elaborate keyboard work by Vangelis, and wordless vocalising. Narration by John Forst is included under Koulouris' guitar solo, restating the breaking of the two seals in "The Seventh Seal" in first person, and featuring three repetitions of the phrase "They'll no more suffer from hunger, they'll no more suffer from thirst". Forst's narration is slowed down in pitch and panned to the right stereo channel, with echo being heard on the left channel. "Aegian Sea" is followed by "Seven Bowls", a sound effect-laden piece in which a chorus narrates the effects of the seven bowls (changing the Euphrates drying up and earthquake of the last two