Human beings possess a remarkable capacity to find moral justifications for their most improper actions, particularly when the victims are within their closest family circles. A person can deeply harm those who love him most, yet entirely convince himself that he has done nothing wrong. This self-deception carries devastating consequences, both for the individual and for society at large.
The primary approach among commentators focuses on the psychological reality of a child who steals from his parents and insists he has committed no crime. He rationalizes the theft by reasoning that his parents toil for his sake anyway, and since he is their future heir, he is merely taking early possession of what will eventually belong to him [רלב״ג, מצודת דוד, עמנואל הרומי, ביאור שטיינזלץ]. He might even convince himself that by depleting his own future inheritance, he is only harming himself and therefore committing no offense against anyone else [אלשיך].
However, this logic is deeply flawed. As long as the parents are alive, their property belongs exclusively to them, making the act undeniable theft [ביאור שטיינזלץ, עמנואל הרומי]. Furthermore, rather than preserving this wealth, the child often carelessly squanders it [אמרי דעת]. The danger of this domestic rationalization is profound. A person who becomes accustomed to stealing within his own home, believing it to be harmless, internalizes the habits of a thief. Ultimately, this behavior will spill over into the public sphere, leading him to rob strangers [רלב״ג, מצודת דוד, עמנואל הרומי]. Alternatively, the destructive companion he aligns with is his own greed, which ruthlessly drives him to harm his own father [אבן עזרא].
From a broader societal perspective, the sinner who believes his actions only affect his own future wealth is gravely mistaken. He is compared to a passenger on a ship who drills a hole beneath his own seat, arguing that he is only damaging his personal space, completely ignoring that the rising water will sink the entire vessel. Similarly, the thief corrupts the entire community, as all of Israel is bound together in mutual responsibility [אלשיך].
A completely different perspective views this scenario as a severe warning against flattery. In this reading, the claim that no crime has occurred comes not from the thief, but from a smooth-talking bystander. Even though robbing one's parents is an exceptionally wicked act, the flatterer soothes the thief's conscience, assuring him that he has done nothing wrong. By doing so, the flatterer becomes an active partner to the corrupt individual, sharing in the destruction and ultimately bringing about the punishment that will befall the sinner [מלבי״ם].
Beyond the literal events, this domestic betrayal serves as a powerful allegory. On a theological and national level, the father represents God, and the mother symbolizes the congregation of Israel. The thief is one who causes the masses to sin, effectively separating God from His children and robbing them of divine goodness. Such an individual aligns himself with historical figures of destruction, such as Jeroboam, who disastrously led the nation astray [רש״י].
In the philosophical realm of self-perfection, the father symbolizes the human intellect, while the mother represents material needs. A person might neglect his intellectual growth while simultaneously denying his body its basic needs through unnecessary self-affliction. He may proudly claim he is free of sin because he never succumbed to base desires or committed overt wrongs. Yet, he is still a companion to destruction. By failing to actualize his intellect and achieve his ultimate purpose, he has tragically ruined his own soul [עמנואל הרומי].