John Trapp on Proverbs 26:23

Verſ. 23. Burning lips and a wicked heart, &c.] The tongue of the righteous is as fined ſilver, but gloſing lips upon a falſe heart is no better than droſſe upon dirt: counterfeit friends are naught on both ſides, having os maledictum & cor malum, as Luther renders this Text; a bad mouth, and a worſe heart. Wicked men are ſaid to ſpeak with an heart and a heart, Pſal. 12. as ſpeaking one thing, and thinking another, drawing a fair glove on a foul hand. Theſe are dangerous to be dealt withall: for like Serpents, they can ſting without hiſſing; like curre doggs, ſuck your bloud only with licking, and in the end kill you and cut your throats without biting: ſo cunning and cloſe are they in the conveyance of their colluſion. Squire ſent out of Spain to poyſon Queen Elizabeth, annoynted the pummel of her ſaddle with poyſon covertly,Camd. Eliz. [illegible: 1 letter]7. and as it were doing ſomewhat elſe, praying with a loud voyce, God ſave the Queen. When thoſe Romiſh Incendiaries, Gifford, Hodgeſon, and others, had ſet Savage a work to kill the ſaid Queen, they firſt ſet forth a Book to perſwade the Engliſh Catholicks to attempt nothing againſt her. So, Parſons, when hee had hatched that nameleſs villany the Powder-plot, ſet forth his book of Reſolution, as if hee had been wholly made up of devotion. Caveatur oſculum Iſcarioticum. It is the property of a godly man to ſpeak the truth from his heart, Pſal. 15.