Martin Luther, Last Sermon in Wittenberg, Second Sunday in Epiphany, 17 January 1546. Sources: Dr. Martin Luthers Werke: Kritische Gesamtausgabe, (Weimar: Herman Boehlaus Nachfolger, 1914), Band 51:126, Line 7ff; ; H. L. Mencken, Treatise on the Gods, p. 244; Christopher Hitchens, God is Not Great, p. 73.https://en.wikiquote.org/wiki/Christianity