The cover picture is "Las Meninas" by Diego Velázquez.
"Semen Dried Into the Silence of Rock and Mineral" is a line from Anaïs Nin's House of Incest. "The Inexpressible Loneliness of Thinking" is a line from the essay "On Poetic Truth" by H.D. Lewis, sometimes mistakenly attributed to Wallace Stevens; I confess that I haven't read the essay and got the line from Marshall Boswell's Understanding David Foster Wallace. I regard this song title as the best I'm likely to come across and I sometimes lament having used it already. "Refusing a Heavenly Mansion" is a line from Yeats. "What in our lives is burnt/in the fire of this?" is a line from "August 1914" by Isaac Rosenberg. Several lines on this album are appropriated from the poetry of Clark Ashton Smith.