Aqidah (Aqeedah) refers to those matters which are believed in, with certainty and conviction, in one’s heart and soul. They are not tainted with any doubt or uncertainty. Muslims have been gifted this via His Book and His Revelations to His Messenger ﷺ. The Arabic word ‘Aqeedah stems from the root ‘aqada, which conveys meanings of certainty and affirmation. This is different from tawheed which is believing in the oneness of Allah.
Thus, Aqidah are the matters which are known from the Qur’an and authentic Hadith and that which the Muslim must believe in his heart, in acknowledgement of the truth of Allah and His Messenger ﷺ.
To know more and to build the strong ‘knot’ of aqidah in your heart, listen to the lectures under this topic.
The proof of a Muslim’s sincerity is, that he pays no heed to that, which is not his business.Abu Hureira: Tirmidhi