It is extremely important that every active Daaee (in fact every Muslim) have a clear and proper understanding of our Aqidah (fundamentals of Islam). The six fundamentals of Islam summarizes the core beliefs of Islam. Those are also known as " Arkan al-Imaan" or " Creed of Islam" or "Articles of beliefs of Islam". Proper knowledge and understanding of these articles build a strong foundation of Islam in each one of us as a Muslim. An individual who doubts any of these articles cannot be considered a Muslim. (1) Belief in Allah (Tawhid or Oneness of Allah) (2) Belief in the Books of Allah (3) Belief in the Messengers of Allah (4) Belief in Angels of Allah (5) Belief in the Day of Judgement (6) Belief in Qadar Detailed discussions of these articles are in the following sections. But the very first thing we will do before any further discussions is to understand "why are we here on earth" or "why did Allah created us" or "what is the Purpose of our life".