Messiaen, the Theologian, not Mystic

"Pure music, profane music, and above all theological music (and not mystical, as the majority of my audience think) alternate in my production." (Olivier Messiaen, from The Reinvention of Religious Music: Olivier Messiaen's Breakthrough Toward the Beyond, Sander van Maas, "It Is a Glistening Music We Seek".)