Nine in the Fourth Place is firm, neither central nor correct. Its intention is to join with the Second, which makes it an adversary to the Fifth. A wall is that which divides and obstructs.
Nine in the Fourth Place is intimately close to Nine in the Fifth Place, as though separated by a wall; moreover, mounting the wall signifies an intent to attack. Yet because its cause is not upright, it cannot prevail.
If it can recognize on its own that its cause is not upright and desist from attacking, it will attain good fortune. Were it to indulge perverse desires, unable to reflect upon right principles and rashly waging attack and usurpation, then great misfortune would ensue.
Nine in the Third Place, being firm and dwelling in a firm place, persists to the end in its obstinacy and cannot turn back.
Nine in the Fourth Place, being firm dwelling in a yielding position, has the meaning of meeting hardship and being able to turn back; being able to turn back brings good fortune. Awe of rightness leading to reform rightly warrants good fortune.
The Xiang Commentary says: 'He mounts his wall, but rightness does not allow him to prevail.'
That 'his good fortune consists in turning back to the rule when hard-pressed' means:
The reason he mounts the wall yet cannot attack is that rightness does not allow him to prevail; attacking the upright with the perverse cannot triumph in right principle.
That he attains good fortune is because, unable to triumph in rightness and facing distress, he returns to the rule and law. The Second is that which all the yang lines desire in common.
That only the Third and Fourth lines have the meaning of rivalry and contention is because these two lines dwell between the Second and the Fifth. The initial and top lines are far removed, hence their interpretations differ.