"Nine in the Fourth Place: Progressing like a marmot; perseverance brings peril." The Sub-commentary states: "Progressing like a marmot"—the marmot is a creature possessing five talents yet failing to master a single craft.
Nine in the Fourth Place treads in a position not its own: above, it bears Six in the Fifth Place; below, it sits atop three yin lines. The one above does not allow its support, and those below do not allow its usurpation.
To advance in this manner leaves no endeavor in which it can rest, and no foundation it can defend; its deeds mirror the marmot's, achieving nothing. Advancing on this basis, even perseverance is perilous; hence it says: "Progressing like a marmot; perseverance brings peril."
Regarding the note from "treading in a position not its own" down to "has nothing to hold fast to": The Sub-commentary explains that for "Progressing like a marmot, it has nothing to hold fast to," Cai Yong's *Encouragement to Learning* states: "The marmot possesses five abilities yet masters not a single craft."
The commentary explains: "It can fly, but cannot clear a roof; it can climb, but cannot reach the treetop; it can swim, but cannot cross a ravine; it can dig, but cannot conceal its body; it can run, but cannot outrun a human."
The *Shennong Bencaojing* states: "The mole cricket is also named the marmot," referring to this creature. Zheng Xuan cites the *Classic of Poetry*: "Large rat, large rat, eat no more of our millet," taking it to mean a giant rodent. Lu Ji regarded it as the sparrow-rat.
Note: Wang Bi interprets it as "having nothing to hold fast to," which indeed corresponds to the five clumsy talents.