A book translated into Kinyarwanda in which Sheikh Abdurrahman ibn Nasir as-Sadi emphasized that the brilliance of material civilization should not blind us from the reality of misery that humanity endures. As a result, he tried to uncover religious, realistic reasons and means to achieve the useful ways of having a happy life.

A brief book translated into Kinyarwanda contains the most important matters that a Muslim needs in his life from the Quran, its explanation, jurisprudence, creed, virtues, etc. It is divided into two parts: (1) Explanation of the last three Quranic parts from the book "Zubdat At-Tafsir" (Best Book of Tafsir) by Shaikh Muhammad ibn Sulaiman Al-Ashqar, (2) Different Islamic matters that a Muslim concerns such as tajweed rules, 62 questions about Islamic creed within a calm dialogue, rules of the two testimonies of faith, purification, prayer, zakah, pilgrimage, supplicating and remembering Allah, etc.