This verse is addressed to people who have 'wronged their own souls'. Its message is that no sin is too great for Allah to forgive when a person sincerely turns back. Many Muslims call it the most hopeful verse in the Qur'an.
Az-Zumar 39:53
Listen on Quran.com۞ قُلْ يَـٰعِبَادِىَ ٱلَّذِينَ أَسْرَفُوا۟ عَلَىٰٓ أَنفُسِهِمْ لَا تَقْنَطُوا۟ مِن رَّحْمَةِ ٱللَّهِ ۚ إِنَّ ٱللَّهَ يَغْفِرُ ٱلذُّنُوبَ جَمِيعًا ۚ إِنَّهُۥ هُوَ ٱلْغَفُورُ ٱلرَّحِيمُ
39:53Say (on My behalf), “O servants of Mine who have acted recklessly against their own selves, do not despair of Allah’s mercy. Surely, Allah will forgive all sins. Surely, He is the One who is the Most-Forgiving, the Very-Merciful.
English translation: Mufti Muhammad Taqi Usmani, The Meanings of the Noble Qur'an, via Quran.com. Arabic: Uthmani script.
Is there something you have been carrying that this verse speaks to?