So near are the boundaries of panegyric and invective, that...

So near are the boundaries of panegyric and invective, that a worn-out sinner is sometimes found to make the best declaimer against sin. The same high-seasoned descriptions which in his unregenerate state served to inflame his appetites, in his new province of a moralist will serve him (a little turned) to expose the enormity of those appetites in other men.