Allah says,

﴿أَلَمْ نَشْرَحْ لَكَ صَدْرَكَ ﴾

(Have We not opened your breast for you) meaning, `have We not opened your chest for you.' This means, `We illuminated it, and We made it spacious, vast and wide.' This is as Allah says,

﴿فَمَن يُرِدِ اللَّهُ أَن يَهْدِيَهُ يَشْرَحْ صَدْرَهُ لِلإِسْلَـمِ﴾

(And whomsoever Allah wills to guide, He opens his breast to Islam.) (6:125) And just as Allah expanded his chest, He also made His Law vast, wide, accommodating and easy, containing no difficulty, hardship or burden.