גּוֹזֵ֤ל ׀ אָ֘בִ֤יו וְאִמּ֗וֹ וְאֹמֵ֥ר אֵֽין־פָּ֑שַׁע חָבֵ֥ר ה֝֗וּא לְאִ֣ישׁ מַשְׁחִֽית׃
Voler père et mère en disant que ce n’est pas un crime, c’est se faire le compagnon d’un artisan de ruines.
Akeidat Yitzchak
The tenth commandment addresses itself to the weakness in man that makes him believe that the attainment of worldly goods provides real and lasting satisfaction. This is merely an illusion, and the planning of how to attain possessions belonging to another, will lead to transgressions of all the other commandments. Despite the fact that the crime in this case does not consist in performance of an act, or even the utterance of words, merely the exercise of one's mind, the ultimate results would be devastating. We could say that he who fails to observe the fifth commandment, that of honouring his parents, will ultimately be likely to reject any kind of restriction on his personal conduct. Disregarding one's fellow man's right to his possessions, is as much a slap in the face of G-d, as failing to honour one's parents, is in the last analysis a slap at the face of G-d.