Try this with someone you trust. They say a word, you say the first word back, fast, ten or so in a row. Black, white, mum, dad, sky. Then notice that nothing strange came out of you.

النجم

ٱلَّذِينَ يَجۡتَنِبُونَ كَبَٰٓئِرَ ٱلۡإِثۡمِ وَٱلۡفَوَٰحِشَ إِلَّا ٱللَّمَمَۚ إِنَّ رَبَّكَ وَٰسِعُ ٱلۡمَغۡفِرَةِۚ هُوَ أَعۡلَمُ بِكُمۡ إِذۡ أَنشَأَكُم مِّنَ ٱلۡأَرۡضِ وَإِذۡ أَنتُمۡ أَجِنَّةࣱ فِي بُطُونِ أُمَّهَٰتِكُمۡۖ فَلَا تُزَكُّوٓاْ أَنفُسَكُمۡۖ هُوَ أَعۡلَمُ بِمَنِ ٱتَّقَىٰٓ

As for those who avoid grave sins and foul acts, though they may commit small sins, your Lord is ample in forgiveness. He has been aware of you from the time He produced you from the earth and from your hiding places in your mothers’ wombs, so do not assert your own goodness:He knows best who is mindful of Him

Qur’an 53:32read it in the library