In this book, we will address the subject of Rajaa' (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 Allaah The Almighty alone. Hope is one of the most powerful means which help a person on his path towards Allaah The Almighty; it also helps one maintain steadfastness on religion, especially during times like the ones we live in now, which are full of temptations, desires, trials and misconceptions.