My brother; this is a study of a valuable treatise by the Imaam, the rectifier, the reviver, Shaykhul-Islaam Muhammad ibn ‘Abdul-Wahhaab—may Allaah have mercy upon him and forgive him— “The Nullifiers of Al-Islaam”. He, may Allaah have mercy upon him, wrote it advising and warning; because just as the Muslim is required to know the truth and guidance in order that he may love it and traverse upon it, he is also required to know falsehood and misguidance in order that he may hate it and avoid it. Allaah, the Glorified and High, has clarified within the Qur’aan the path of the believers as well as the path of the criminals; the actions of the believers and the actions of the criminals and the qualities of each as well as the end result of each. He also clarified that which he has prepared for the believers from abundant reward and that which he has prepared for the criminals from painful punishment.
“He who does not know falsehood will fall into it whilst not perceiving it.”
When learning about Islam as children, we were taught that the first pillar is to affirm that there is none worthy of worship except Allāh (سُبْحَانَهُ وَ تَعَالَى) and that Muhammad (ﷺ) is the Messenger of Allāh. “Well, that is easy,” we think to ourselves. We obviously don’t believe that Prophet ‘Isa (Jesus عَلَيْهِ ٱلسَّلَامُ), Buddha, the sun, the pagan idols of Arabia, and so on are worthy of worship. So we quickly move on to the next pillar. However, shirk isn’t always as obvious as someone prostrating in front of an idol. And merely uttering the declaration of faith without fulfilling its conditions and avoiding that which nullifies it will be of no benefit.
This is one of the first books on aqīdah I read and it's still one of my favorites. The author mentions ten clear and easy-to-understand nullifiers, along with their explanation and evidences from the Qur’an and Sunnah. I found this book to be very beginner friendly. The brevity of this book allows us to quickly go through and reflect on each point, asking ourselves whether or not we fall into these categories. Not just once, but periodically, because we are never fully secure in this regard. Even Prophet Ibrāhīm (عَلَيْهِ ٱلسَّلَامُ), the Imām of the monotheists who destroyed the idols of his nation with his own hands, was afraid of it. Thus he supplicated to Allāh:
“And keep me and my sons away from worshipping idols.”