True spiritual repair requires careful preparation, much like a farmer tending to the earth. A wise farmer knows that simply scattering seeds over unprepared ground is a waste of effort; the soil must first be made ready. In a direct appeal to the people of Judah [מצודת דוד], the prophet uses this precise agricultural imagery to explain the necessary steps for sincere repentance and turning back to God.
The primary approach among commentators is that this preparation is an absolute requirement for God to accept a person's return. Just as field workers engage in deep plowing during the summer to uproot and kill harmful weeds before planting in clean soil [רש״י, מצודת דוד, מלבי״ם], a deep spiritual plowing must take place within the individual. This action represents the active uprooting of evil. For the people of Judah, this meant physically removing their idols [מצודת דוד, אברבנאל]. On a personal level, it requires pulling up bad traits, improper thoughts, and false beliefs that have taken root in the heart [מלבי״ם, חומת אנך]. Only through this thorough clearing can the heart be truly prepared to receive His words, ensuring that any commitment to God is genuine and not merely empty lip service [רד״ק].
The danger of skipping this vital step is compared to planting seeds among thorns [רד״ק, מצודת ציון]. If seeds are sown without prior plowing, a crop might temporarily grow, but the existing thorns will quickly take over and choke it [ביאור שטיינזלץ, מלבי״ם]. Spiritually, this means that if a person attempts to perform commandments, pray, or cry out to God for help while still clinging to their sins and negative habits, their good deeds will ultimately go to waste and their prayers will be rejected [רש״י, מצודת דוד, חומת אנך]. A person cannot expect salvation while remaining in a state of wickedness; true rescue only comes after abandoning sin and offering sincere repentance [רד״ק].
On a historical level, this message served as an urgent warning for the people of Judah to cure the illness before the blow landed. They needed to improve their ways before disaster struck [רש״י], taking a moral lesson from the tragic exile of the Ten Tribes. While those exiled tribes would eventually repent, they would only do so out of intense suffering after the destruction had already occurred. The people of Judah, however, were urged to uproot their spiritual thorns in advance, rather than waiting for punishment and ruin to finally feel regret [אברבנאל].