Imām Muḥammad b. ʿAbd al-Wahhāb states in “The Three Fundamental Principles” that the third area of knowledge we are obligated to learn is about Islām.
Allāh the Exalted created us to worship Him alone, until our very last breath: Allāh the Exalted said, {And We did not create the jinn and mankind except to worship Me}. He created us to devote our hearts, speech and actions to please Him, and gain closeness to Him alone.
In order for us to achieve this, Allāh gave us a complete way of life which, if we live by, our every moment in life will become an act of worship and devotion to Allāh. On top of our prayers, charity, fasting and pilgrimage, our mundane and customary acts such as eating, drinking, sleeping, studying working, marrying, raising children, keeping the ties of kinship – all of these become acts of worship if we follow Islām.
This is why scholars such as Sh. Ibn Bāz said:
