وَإِذَا قَرَأْتَ الْقُرْآنَ جَعَلْنَا بَيْنَكَ وَبَيْنَ الَّذِينَ لَا يُؤْمِنُونَ بِالْآخِرَةِ حِجَابًا مَّسْتُورًا 
In this book, we will address the subject of hope, which is one of the deeds of the heart, and the most important of them all; having hope is an obligation, and one which must be directed to Allah, the Almighty, alone.