Alƙur'ani yana gayyatar mutane akai-akai su duba canjin dare da rana, ruwan sama da yake raya ƙasa matacciya, halittar ɗan Adam da taurari, a matsayin alamu ga mutane masu tunani. Ba ya roƙon imani na makanta: yana roƙon tunani. Masana falsafa Musulmi sun ƙirƙiri hujjoji kamar hujjar farkon sararin samaniya da ta dogaro, waɗanda daga baya suka rinjayi masu tunani na Turai.
Musulmi kuma suna cewa ana san Allah ta hanyar gogewa: ta sallah, sauƙi bayan wahala da zaman lafiya da ke zuwa daga tunawa da shi. Hujja iri-iri ce kuma ƙila ba za ta gamsar da wanda ya riga ya yanke shawara ba. Musulmi suna gayyatar masu neman gaskiya su yi tambayoyi, su karanta Alƙur'ani kuma su roƙi Allah da gaske don shiriya.