DR. FAUSTUS - Chapter XXV

"But choose any one you list among the pet names the peasants give me. Only one I cannot and will not abide because it is distinctly a malicious slander and fits me not a whit. Whosoever calls me Dicis et non facis is in the wrong box. It too may even be a finger chucking my chin, but it is a calumny. I do ywisse what I say, keep my promise to a tittle; that is precisely my business principle, more or less as the Jews are the most reliable dealers, and when it comes to deceit, well, it is a common saying that it was always I, who believe in good faith and right-wiseness, who am beguiled"