This is the English translation of Sharh Thalaathul-Usool by Shaykh Muhammad ibn Saalih Al-Uthaymeen. This is an explanation of the booklet Thalaathul-Usool ("The Three Principles") by Shaykh Muhammad ibn 'Abdul-Wahhaab, rahimatullah, who wrote this in order to convey to every Muslim that which is obligatory upon him to know - in fact, the "three principles" are based on the three questions that we will all be asked in our graves. As such this book will be beneficial for everyone. Includes the original Arabic text.