In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Shaikh Islaam Ibn Taymiyyah [rahimahullaah] said:
And even though there is something in the paths of analogical reasoning and reflection that will lead to knowledge, however sometimes it cannot give detail explanation in a dispute between the people of the earth due to the minute details and ambiguities [in that dispute], and at other times due to the fact the people differ when prioritising necessities. Therefore, due to this Allaah [The Most High] commanded [us] to return to the revelation in times of dispute. Allaah [The Most High] said: [ كَانَ ٱلنَّاسُ أُمَّةً۬ وَٲحِدَةً۬ فَبَعَثَ ٱللَّهُ ٱلنَّبِيِّـۧنَ مُبَشِّرِينَ وَمُنذِرِينَ وَأَنزَلَ مَعَهُمُ ٱلۡكِتَـٰبَ بِٱلۡحَقِّ لِيَحۡكُمَ بَيۡنَ ٱلنَّاسِ فِيمَا ٱخۡتَلَفُواْ فِيهِۚ -Mankind were one community (i.e. upon Tawheed and Allaah’s Sharee’ah) and Allah sent Prophets with glad tidings and warnings, and with them He sent the Scripture in truth to judge between people in matters wherein they differed]. [Surah Al-Baqarah’ Aayah 213]
Therefore, Allaah [The Most High] designated the revealed Books [i.e. the Qur’aan being the final of them] as the judge between the people in matters wherein they differ. [Ref 1]
Shaikh Abdur Razzaaq Al-Badr [hafidhahullaah] said: If you say that the intellect is to be given precedence over the revelation, then which intellect should we follow? Are the intellects of the people combined in the intellect of one man or do they differ? There are intellects of the philosophers, the atheists, the heretics, the people of evil desires and those who confound truth with falsehood; and due to this one of the Salaf said, “Had the desires been one, it would have been considered to be the [basis of] truth”; therefore, we say, “Had the intellects been one, it would have been considered to be the [basis of] truth”. [Ref 2]
[Ref 1. Dar Ta’aarud Al-Aql Wan-Naql: 9/17-18]; [Ref 2. Muqaddimah Fee Diraasah At-Tawheed’ by Shaikh Abdur-Razzaaq Al-Badr (may Allaah preserve him) Lesson: 3]