Sentence:  “... Tryan's sermons ... [are] not at all what I expected—dull, stupid things—nothing of the roaring fire-and-brimstone sort that I expected.” / “Roaring? No; Tryan's as soft as a sucking dove—one of your <WSD>honey-mouthed</WSD> hypocrites.” 
Meaning of the word marked with <WSD> tags:  ("in a negative sense") Indirect, delivering a message in a way that will make it seem more pleasant to the hearer(s); seductive, persuasive.