Musulunci yana kan wata babbar ka'ida daya kuma tabbata: fahimtar Mahalicci guda daya, Allah (SWT), da cikakkiyar mika wuya gare Shi. Wannan mika wuya yana nufin dukkan al'amuran rayuwa dole ne a mayar da su ga Allah (SWT) domin hukunci, ko sallolinmu, azuminmu, dangantakarmu da iyalanmu ko da wadanda ba musulmi ba, da al'amuran siyasa da tattalin arziki. Ginshikan imani (imani da Allah, da Mala'ikunsa, da Manzanninsa, da littattafansa, da Ranar Lahira, da kaddara da kaddarar Allah) su ne tushen dukkan ayyukanmu. Saboda haka, muna komawa ga Littafin Allah (SWT) da Sunnar ManzonSa (SAW) kadai a matsayin wahayi (wahi), da kuma madogarar da aka samo daga gare su, wato Ijma'i (yarjejeniyar Sahabbai) da Kiyasi, domin neman shiriya. Duk da cewa babu wani musulmi da zai shiga addini ba tare da cikakken yakini ga akidun imani ('aqeedah) ba, karbar dokoki da bin su wajibi ne, ko mumini ya fahimce su sosai ko bai fahimce su ba. Allah (SWT) ya ce,

Islam is based upon one main fixed idea - the comprehension of one Creator, Allah (swt), and complete submission to Him. This submission means that all reference for lifes affairs must be directed to Allah (swt) for judgement, whether our prayers, fasting, relations with our families or non-Muslims, political and economic matters. The central pillars of faith (belief in Allah, His Angels, His Messengers, His books, the Day of Judgement and Divine fate and destiny) form the basis of all our actions. Therefore we refer only to the Book of Allah (swt) and the Sunnah of His Messenger (saw) as revelation (wahi) and the sources derived from these, Ijma‘ (consensus) of the Sahabah and Qiyas, for guidance. Whilst no Muslim enters the deen without full conviction in the articles of belief (‘aqeedah), the adoption of laws and the adherence to them are compulsory regardless of whether the believer fully understands them or not. Allah (swt) says,.