Aqeedah (Creed), in English, is defined as a set of beliefs that summarize core tenets of a religion. In Islam, it is the most important factor, as it makes a Muslim what he/she is. One’s state of faith and one’s upright status depends largely on what creed one follows. To be rightly guided and in order to make sure one is on the straight path, it is important to correct one’s Aqeedah. Without it, many of one’s acts maybe meaningless and many would also turn out to be sins in truth.
First step in correcting the Aqeedah is understanding and actualizing the Tawheed (Monotheism).
Imam ibn Taymiyyah, a great scholar of Islam from the 13th century has written few wonderful books that address the concept of Aqeedah. The most wonderful among those books are Aqeedah al Wasitiyyah and Aqeedah al Hamawiyyah. The Imam wrote the latter in response to few questions presented to him. The former is a book that deals with the Pure Islamic Creed.