The primary source of guidance revealed to mankind from Allah Ta’ala is the Qur’an. The Noble Qur’an in its entirety is a means of guidance for mankind at large. It (Noble Qur’an) comprises of incidents and events of the past nations, scenes of the hereafter, admonishments for the evil-doers and glad-tidings for the pious, etc. Similarly it also comprises of laws and injunctions of Shariah.
With regard to the verses of the Qur’an that explain stories and events of the past nations, scenes of the hereafter, etc., Allah Ta’ala declares:
And We have indeed made the Qur’an easy to understand and seek advice, then is there anyone to seek advice? (Surah Qamar 54/40)
As far as these verses are concerned (i.e. stories and events of the past nations), they are easily comprehendible to any person conversant in the Arabic language or even those who refer to the translations of the Holy Qur’an. As for those verses of the Qur’an which discuss shari’ee laws and injunctions, let alone those who are well conversant in the Arabic language, even the Sahabah (Radiyallahu Anhum) were unable to fathom the meanings of such verses or unravel their hidden secrets without the intermediary of Rasulullah (Sallallahu Alayhi Wasallam).