Hadith is the second most important foundational source of Islamic knowledge after the Qur'an. Hadith is a scholarly discipline that studies the Prophet Muhammad's (pbuh) sayings and actions which have been carefully recorded based on the reports of a reliable chain of narrators. This book is a part of this centuries-long discipline in which compilations of forty hadiths have been made into books according to varying preferences. The translations and commentary in this book are a collection from the various books of M Fethullah Gülen.