From 'The Xiang says: The good fortune of restful return' to 'no fault.' Zhengyi says: 'Repeated return'—pin means frowning in distress. Six in the Third Place dwells atop the lower trigram, somewhat distant from the return.
Although superior to the deluded return of Six at the Top, it still returns only with a furrowed brow. The way of return should be swift, but here it seeks return in distress. Still relatively close to return, although there is danger, in principle there is no fault.
Hence the Xiang says: 'In principle, there is no fault.'
Regarding the commentary 'the appearance of frowning in distress' to 'if other matters come, preservation is difficult'—Zhengyi says: 'Though in principle there is no fault, if other matters come, it is hard to preserve' means that because it is not yet excessively far from return, in principle it is blameless, meaning that by guarding oneself with the Dao, one attains 'no blame.'
But if beyond self-guarding other matters arrive from elsewhere, it is difficult to maintain this auspiciousness of being without fault. Thus the Xiang says 'in principle there is no fault,' meaning that the principle of maintaining constancy attains freedom from blame.