The third line, being yin and yielding, is neither central nor correct, which constitutes falsehood. Furthermore, its intention responds to the top line, which is desire, and that too is falsehood. In the Way of Innocence, it becomes a calamity.
Man's false actions arise from having desires. If one obtains through false action, one will certainly also lose; even if one happens to obtain what is advantageous, the loss from acting in falsehood is already great, not to mention that misfortune and regret follow in its wake.
The wise, seeing what is obtained through falsehood, know that the loss will certainly match it.
Therefore the sage, based on Six in the Third Place having the image of falsehood, illuminated this principle, saying: 'The calamity of innocence: an ox perhaps tethered—the traveler's gain, the townsman's calamity.'
This means that falsehood like that of the third line is a calamity to innocence. Suppose there is a gain; the loss immediately follows. It is like 'an ox perhaps tethered'—'perhaps' means supposing.
If someone tethers and catches an ox, the traveler gets it and considers it a gain, while the townsman loses the ox and suffers calamity. Supposing the townsman tethered and caught a horse, then the traveler losing the horse would be the calamity.
This shows that where there is gain, there is loss, which is not worthy of being considered true gain. 'Traveler' and 'townsman' simply illustrate that where there is gain, there is loss; it is not about this person or that person.
With the blessing gained through falsehood, calamity follows; with the gain obtained through falsehood, the loss matches it, so it is fundamentally unworthy of being considered a gain. If one understands this, one will not act in falsehood.