﴿ إِن تَكْفُرُوا۟ فَإِنَّ ٱللَّهَ غَنِىٌّ عَنكُمْ ۖ وَلَا يَرْضَىٰ لِعِبَادِهِ ٱلْكُفْرَ ۖ وَإِن تَشْكُرُوا۟ يَرْضَهُ لَكُمْ ۗ وَلَا تَزِرُ وَازِرَةٌۭ وِزْرَ أُخْرَىٰ ۗ ثُمَّ إِلَىٰ رَبِّكُم مَّرْجِعُكُمْ فَيُنَبِّئُكُم بِمَا كُنتُمْ تَعْمَلُونَ ۚ إِنَّهُۥ عَلِيمٌۢ بِذَاتِ ٱلصُّدُورِ ﴾

“If you are ingrate behold, God has no need of you; none the less, He does not approve of in­gratitude in His servants: whereas, if you show grati­tude, He approves it in you. And no bearer of burdens shall be made to bear another’s burden. In time, unto your Sustainer you all must return, and then He will make you [truly] understand all that you were doing [in life]: for, verily, He has full knowledge of what is in the hearts [of men].”

To accept God and be grateful to Him is sought by the soul of man. Such an acknowledgement amounts to the admission of the Truth, which undoubtedly is the greatest demand of rationality.