A person approaching holiness while harboring a corrupt and idolatrous heart cannot hide behind a mask of innocence. When an individual entrenched in secret sins meets a true prophet, the stark contrast between their outward appearance and inner reality invites a direct, revealing, and unexpected response from God.
The prophet is instructed to speak directly to these individuals [רד״ק ומצודת דוד]. These are people who hold onto the worship of false gods in their minds yet still approach the prophet to seek a word from God [מצודת דוד]. They step forward hoping their hidden thoughts remain undetected [ביאור שטיינזלץ]. Conversely, they might approach with deep arrogance, aiming to argue, deny the truth, and turn the encounter into an act of pure defiance [מלבי״ם].
Usually, God does not treat a wicked thought as an actual deed. Idolatry, however, is a unique exception. Because the prohibition against worshipping false gods was delivered directly by God at Mount Sinai, He treats thoughts and words about this specific sin as equals. Therefore, merely thinking about idolatry is counted as if the individual has actively committed the offense [חומת אנך].
When confronted with such a person, the primary approach among commentators is that God declares He will indeed provide an answer, despite the individual being completely immersed in idolatry [רש״י ומצודת דוד]. Yet, this divine response is not meant to fulfill their request or offer favor. Instead, God answers specifically to expose the corruption hidden within their heart [רד״ק], replying with harsh and painful words [ביאור שטיינזלץ]. Other perspectives suggest that God's response is not a verbal answer at all, but rather an active engagement. In this view, God personally deals with the individual to rebuke them for their actions [מלבי״ם וביאור שטיינזלץ]. A further approach connects this reaction back to Mount Sinai, with God affirming that because He personally commanded the people against this sin in the past, He holds them fully accountable and punishes them even for their thoughts [חומת אנך].
Ultimately, the very act of approaching the prophet while still clinging to a multitude of false gods seals their fate. Because they dare to step forward in such a deceptive state, God confronts them directly and lays their shame bare [רד״ק ומנחת שי].