Lt. Col. Michael Aquino
From Wikipedia's page on The Temple of Set: Born in 1946, Michael Aquino was a military intelligence officer specializing in psychological warfare . In 1969 he joined Anton LaVey's Church of Satan and rose rapidly through the group's ranks  In 1970, while he was serving with the U.S. military during the Vietnam War, Aquino was stationed in Bến Cát in South Vietnam when he authored a tract entitled "Diabolicon" in which he reflected upon his growing divergence from the Church of Satan's doctrines . In this tract, teachings about the creation of the world, God, and humanity are presented, as is the dualistic idea that Satan complements God . The character of Lucifer is presented as bringing insight to human society,  a perspective that was inherited from the depiction of Lucifer in John Milton's seventeenth-century epic poem Paradise Lost .