Impossible natural events often serve as a mirror for human foolishness. The image of horses galloping across jagged rocks or oxen attempting to plow solid stone highlights the absurdity of a society that destroys its own moral foundation [רד״ק, ביאור שטיינזלץ]. Just as horses will inevitably break their hooves on hard stone, and plowing a rock will ruin the animals without yielding any profit, a person cannot abandon the path of honesty and expect to benefit from it [מצודת דוד]. This vivid imagery mocks the people's dangerous illusion that they can flip the natural order, abandon goodness, and somehow still survive and thrive [רש״י, אבן עזרא].
The hard, unyielding stone is not merely a physical obstacle; it reflects the closed, proud hearts of the people, who are no longer capable of accepting moral instruction or controlling their desires [מלבי״ם, אברבנאל]. As a direct result of this stubbornness, their actual land is reduced to a hopeless, rocky field [ביאור שטיינזלץ]. When crisis strikes, the very actions they rely on will fail them. They will not be able to gallop away on their horses to escape the sword of war, nor will they be able to plow their ruined land to survive a famine [מלבי״ם, אברבנאל].
The underlying cause of this destruction is a complete inversion of society's core values. Justice and righteousness are meant to be sweet forces that sustain the world, bringing peace and stability [אבן עזרא, רד״ק]. Instead, the people transformed these life-giving principles into bitter, poisonous weeds that bring only death [מצודת ציון, רד״ק, ביאור שטיינזלץ].
In daily life, this moral decay took very real forms. While some view this as the people filling the land with oppression, violence, and robbery instead of maintaining fair courts [אברבנאל], others see it as a complete rejection of God's laws in favor of idol worship and foreign practices [מצודת דוד]. Regardless of how it manifested, the outcome is devastating. Corrupting justice between people ensures defeat in war, while a lack of righteousness toward God stops the rain and leaves the land desolate [מלבי״ם]. Ultimately, whoever destroys the foundations of justice works against the very order of the world, bringing certain ruin upon themselves, exactly like a person trying to plow a rock [מצודת דוד, רד״ק].