Occupying a Yang place with firmness, dwelling in strength, and standing at the end of the Qian body, it is the extreme of strength.
When strength reaches such an extreme, for the petty person it becomes the use of physical force, while for the gentleman it becomes the use of wǎng (disregard/net).
The petty person values strength and thus uses his forceful boldness; the gentleman's will is unyielding, so he uses wǎng. 'Wǎng' means nonexistence, like saying contemptuous disregard—because of supreme firmness, he scorns affairs and acts without dread or hesitation.
The gentleman and the petty person are spoken of in terms of their disposition: just as when a gentleman possesses courage without righteousness, disorder arises.
When firmness and yielding attain the mean, one neither snaps nor bends, and applying this to the world brings fitness everywhere. If firmness is excessive, there is no virtue of harmonious compliance; much injury results, and none assists.
To stubbornly persist in this is a perilous path. All creatures use their strength: those with teeth bite, those with horns butt, those with hooves kick. The ram's strength lies in its head, and the ram loves to butt, hence it is taken as an image.
The ram loves to butt the hedge because the hedge stands before it. Butting whatever stands before it and delighting in employing strength like this, its horns must inevitably become entangled and trapped.
It is just like a person who prizes unyielding strength, employing it against whatever he faces; he must ultimately meet breakage and distress. When the third line is so excessively strong, why does it not arrive at misfortune?
The answer is: What the third line does is sufficient to bring misfortune, but the text speaks only of its peril, so it has not yet reached full misfortune. Whenever something can lead to misfortune but has not yet arrived at it, it is termed 'perilous' (lì).