In The Name of Allaah, The Most Merciful, The Bestower of Mercy

Allaah [The Most High] said:

كَلَّآ إِنَّ ٱلۡإِنسَـٰنَ لَيَطۡغَىٰٓ

 أَن رَّءَاهُ ٱسۡتَغۡنَىٰٓ

 إِنَّ إِلَىٰ رَبِّكَ ٱلرُّجۡعَىٰٓ

Nay! Verily, man does transgress all bounds [in disbelief and evil deed, etc.]. Because he considers himself self-sufficient. Surely! Unto your Lord is the return. [Surah Al-Alaq. Aayaat 6-8]

He considers himself self-sufficient – neither in need of his Lord nor in need of obedience to his Lord. This view of his is the cause of every destruction and transgression. It distances him from servitude to Allaah and the fact that he is completely in need of Allaah. [Ref 1]

Due to his ignorance and wrongdoing, he transgresses after considering himself self-sufficient; rebels, becomes haughty towards guidance [i.e. the guidance sent down by Allaah],  forgets that he will finally return to his Lord and  fears not the recompense [on the day of judgement]; rather he might reach such a state that he abandons guidance and call others to abandon it, such as forbidding (others) from performing the prayer which is the best act of Eemaan. [Ref 2]

[Ref 1: An Excerpt from ‘Badaa’i At-tafseer Al-Jaami Limaa Fassarahu al-Imaam Ibnul Qayyim’ Vol 3. page 344). Slightly paraphrased]; [Ref 2: An Excerpt from ‘Tayseer Al-Kareem Ar-Rahmaan Fee Tafseer kalaam Al-Mannaan’. slightly paraphrased]