Imam al-Razi said in his “Testament” (wasiyya):

 “I have explored the ways of kalam and the methods of philosophy, and I did not see in them a benefit that compares with the benefit I found in the Qur’an. For the latter hurries us to acknowledge that greatness and majesty belong only to Allah, precluding us from involvement into the explication of objections and contentions. This is for no other reason than because human minds find themselves deadened in those deep, vexing exercises and obscure ways [of kalam and philosophy].

 Therefore, I say that everything that stands established by literal proofs concerning the necessity of Allah’s existence, His oneness, His exemption from any and all partners, as well as His beginninglessness and pre-existence, His disposal of all things, His exclusive efficacy: that is what I also believe, and what I hope to meet Allah with.

 As for what is ultimately subtle and unclear, as well as all that is mentioned in the Qur’an and the sound books of hadith that specifically bears one meaning: it is all exactly as the text says. Whatever is otherwise, I say: O God of the worlds, I see that all of creation concur that You are the most generous of all generous ones,  and the most merciful of them; therefore, concerning anything I wrote or thought, I bear witness that if You saw that I tried to declare true something false, or declare false something true, then do with me as I deserve; but if you saw that I only tried to declare transcendent whatever I considered truly transcendent, and believed so truthfully, then let Your mercy be commensurate with my intention, not with my outcome….

        As for the books which I authored and in which I listed and explicated countless questions, let whoever looks into them remember me kindly and pray for me out of compassion and benevolence, or else, strike out any wrong words. For I did not intend other than abundant investigation and the sharpening of thought, all the while relying upon Allah.