My brother, this is a study of a valuable treatise by the Imaam, the rectifier, the reviver, Shaykhul-Islām Muhammad ibn 'Abdul-Wahhaab-may Allah have mercy upon him and forgive him-entitled: "The Nullifiers of Al-Islām." He, may Allah have mercy upon him, wrote it advising and warning; because just as the Muslim is required to know the truth and guidance so that he may love it and traverse upon it, he is also required to know falsehood and misguidance so that he may hate it and avoid it.