Ron did very well until he reached the hinkypunk, which successfully confused him into sinking waist-high into the quagmire.
J. K. Rowling
Harry Potter and the Prisoner of Azkaban
Sometimes, however, coming from those lofty mountains which dominate the moral horizon, justice, wisdom, reason, right, formed of the pure snow of the ideal, after a long fall from rock to rock, after having reflected the sky in its transparency and increased by a hundred affluents in the majestic mien of triumph, insurrection is suddenly lost in some quagmire, as the Rhine is in a swamp.
Victor Hugo
Les Misérables