التفسير التبليغي
(No! Verily, man transgresses) (Kallā inna al-insāna layaṭghā) meaning, it is not fitting for man to be like this.
The fiercest enemy of man is his own self, which is between his two sides.
Were it not for calamities, the servant would become insolent, oppressive, and transgress; so He (Allah) protects him from that through them, and purifies him from what is within him. So glorified be He who shows mercy through His trials, and tests through His blessings. (Al-Adab ash-Shar'iyyah - Ibn Muflih).
(Verily, man transgresses) (Inna al-insāna layaṭghā) Some transgress when they become wealthy. No transgressor admits that he has transgressed.
There is no cure for transgression except remembering the recompense.
A warning for the transgressor and a belittlement of wealth that perishes.
He informed of man's transgression and hastened to mention its cure.
He drew attention to the fact that this needy nation will have the treasures of the earth opened for it, and wealth will make it transgress, just as it made those before it transgress. "Two are insatiable: a seeker of knowledge and a seeker of worldly possessions."
Two are insatiable: the seeker of knowledge and the seeker of worldly possessions. And they are not equal. As for the seeker of knowledge, he increases for the pleasure of the Most Merciful. As for the seeker of worldly possessions, he persists in transgression.
(No! Verily, man transgresses) (Kallā inna al-insāna layaṭghā) (Because he sees himself self-sufficient) (An ra'āhu istaghnā). The cause of his transgression was his feeling of self-sufficiency.
Source: التفسير التبليغي