The enmity between man and Shaytaan is old, commencing from the time Allah ordered Shaytaan to prostrate before Adam (alayhi as-salaam). Shaytaan refused, become arrogant and hence disobeyed his Lord. His arrogance and pride led him to commit a number sinsHe made every effort to mislead the children of Adam and made sins look good to them such that they accepted them and eagerly committed them. Allah enjoins His servants to observe certain injunctions  in order to secure them from the evil of Shaytaan. In the light of Allah's instructions,  and warnings, mankind becomes separated into two groups: a group who were guided and a group who deserved to be misguided. The groups who were guided are the inhabitants of Paradise and the groups who were misguided are the denizens of the Fire. The inhabitants of Paradise are the awliyaa of the Most Merciful and the denizens of hellfire are the awliyaa of Shaytaan.