Deep within the human mind, a constant struggle takes place between physical weakness and a spiritual demand for truth. True atonement requires absolute honesty before God, reaching into the most hidden places where thoughts are first formed. The primary approach among commentators notes that this inner realm is represented by the kidneys, traditionally viewed as the source of human thought and counsel, which are physically covered and protected by fat. Alongside them is the heart, representing the most sealed and hidden layers of the soul [רש״י, רד״ק, מצודת ציון, אבן עזרא, מצודת דוד, מאירי, מלבי״ם, ביאור שטיינזלץ].
Despite falling into sin, a person can still declare their deep inner faith. Even when physical urges overpower someone and lead to a physical failing, their inner truth, faith in God, and desire for good remain pure within these hidden places, entirely free from any intention to rebel [רד״ק, אבן עזרא, מאירי]. God desires this profound inner truth, which naturally gives rise to a sincere confession where a person's spoken words perfectly match their heart [רש״י, אלשיך, ביאור שטיינזלץ].
However, human nature is highly complex and limited. While God provided people with the mental and spiritual tools needed to avoid sin, the ability to grasp the truth is often buried under the body's physical desires, and practical wisdom remains sealed deep within the soul. Because these protective tools are so deeply hidden, it is incredibly easy for a person to stumble and fail [מלבי״ם, מאירי]. Furthermore, because these inner depths are the very wellspring of wisdom, harboring even a single bad thought there is considered a severe spiritual flaw [מצודת דוד].
Out of this deep internal conflict comes a heartfelt plea for wisdom. A person begs God to open their eyes and reveal the hidden, fundamental flaws buried within their own soul, allowing them to purify themselves and confess properly [רש״י, רד״ק, ביאור שטיינזלץ]. They ask God to actively draw knowledge inward [רש״י], causing wisdom to flow naturally from these hidden places, just as it did for the forefathers of the nation [אלשיך]. Ultimately, it is this very core of inner truth and faith that will emerge to guide a person and teach them true wisdom [אבן עזרא].