Lesson in the Fundamentals of Islamic Monotheism (tawheed), from Qawaid al-Arba’a (The Four Principles) of Shaykh Muhammad ibn Abdul Wahhaab.
This is based on a treatise in which the Shaykh discusses and brings the evidence for four principles; about knowing the kufaar, knowing what they worship, that they differ in their religions, and the mushrikeen of now are worse than those before. They relate to Tawhid and Shirk. Tawhid refers to the fact that there is none who has the right to be worshipped except Allah alone, and that is the purpose behind the creation of humankind and Jinn as well as the primary purpose behind the sending of the Prophets and Messengers. Shirk is the opposite of Tawhid and its nullifier. It is to direct worship to other than Allah. The author states the grievous sin of Shirk and how many Muslims in later times fell into polytheistic practices such as supplicating to the deceased in their graves and depending upon them for salvation. The principles are not based upon mere personal deductions, rather they are taken from the Qur’aan and the Sunnah of the Prophet ﷺ.