Voice of an Angel, Heart of a Devil–The Hypocrite

Hypocrites are like pictures on canvas, they show fairest at farthest. A hypocrites profession is in folio, but his sincerity in decimo-sexto, nothing in the world to speak of. A hypocrite is like the Sicilian Etna, flaming at the mouth when it has snow at the foot: their mouths talk hotly, but their feet walk coldly. The nightingale has a sweet voice, but a lean carcass ;a voice, and nothing else but a voice: and so have all hypocrites…
Hypocrites labour to seem saints, not to be so; but the holy labour to be saints, more than to seem saints. The kite may fly aloft, but her mind and eye is to the earth. She seems to be a gallant bird at her pitch, till she falls down upon a carrion. Oh, how the pretentious zealot makes a show to honour Christ with his lofty profession, as if he were altogether a man of heaven: tarry but a little, throw the bait of glory his way, and he will stoop to a carrion, and be taken with the pride of his own commendation…
If you have an angels tongue and a devils heart, you are not better than  a post in the crossway, that rots itself to direct others, or a torch that, having pleasured others with the light, goes out itself in smoke and stench.
—Thomas Adams "Homiletical Encylopedia"