All lines speak of 'dispersion,' referring to the time of dispersion. Dwelling in the midst of peril during a time of dispersion, regret is certain. If one can rush toward what brings peace, regret will vanish.
A stool (机, jī) is something one leans upon for rest; leaning down means stooping to what is below; rushing means hastening forward.
Though Two and Beginning lack proper correspondence, in a time of separation both have no partner; being yin and yang adjacent in close seeking, they rely on one another. Thus Two regards Beginning as its support, while Beginning regards Two as its horse.
Two hastens to Beginning for security, thereby making its regret vanish. Although Beginning belongs to the Kǎn trigram, it is not trapped in peril.
Some doubt whether Beginning's yielding weakness is sufficient to rely upon; yet in a time of dispersion, uniting strength brings victory. Former scholars all regarded Five as the stool, which is mistaken: in a time of separation, how could two yang lines unite?
If they could unite, their merit in rescuing from dispersion would be vast—how could it merely stop at regret vanishing? The stool means bending down to find support. The Commentary on the Image says: 'In dispersion, he rushes to his support': he attains his wish.
In a time of dispersion, safety lies in uniting. Two dwells in peril and hastens to Beginning seeking safety; relying on it like a stool causes regret to vanish, thus attaining what it wished.