"Indeed, this Quran guides" meaning: it invites "to that which is most upright" meaning: most correct.
﴿إِن هَذَا الْقُرْآن يهدي﴾ أَيْ: يَدْعُو ﴿لِلَّتِي هِيَ أَقْوَمُ﴾ أَي: أصوب.
