Re: Some food for thought…
Any one who is sincere in understanding GOD will be guided and anyone who is not, will be left astray - hence some deny GOD altogether due to the inflictions, clamity, trying time one faces as a test from his Lord. Not knowing that every hardship must end because that is the promise of GOD and because that is what history teaches us - a little research will do in this case… However, here in Surah Aal-e-Imran (3) Allah
describes such people (Ool-ul-Albaab) Himself, for whom NO prophet or NO Book is needed to recognize ONE God (Aristotle did, and so did many sahaaba’s in Makkah before Muahhammad:saw2: and prophethood came as the stamp on their understanding):

190] Behold! in the creation of the heavens and the earth, and the alternation of night and day,- there are indeed Signs for men of understanding,-
191] Men who celebrate the praises of Allah, standing, sitting, and lying down on their sides, and contemplate the (wonders of) creation in the heavens and the earth, (With the thought): "Our Lord! not for naught Hast Thou created (all) this! Glory to Thee! Give us salvation from the penalty of the Fire.
192] "Our Lord! any whom Thou dost admit to the Fire, Truly Thou coverest with shame, and never will wrong-doers Find any helpers! "
193] “Our Lord! we have heard the call of one calling (Us) to Faith, ‘Believe ye in the Lord,’ and we have believed. Our Lord! Forgive us our sins, blot out from us our iniquities, and take to Thyself our souls in the company of the righteous.”
194] “Our Lord! Grant us what Thou didst promise unto us through Thine apostles, and save us from shame on the Day of Judgment: For Thou never breakest Thy promise.”
195] And their Lord hath accepted of them, and answered them: “Never will I suffer to be lost the work of any of you, be he male or female: Ye are members, one of another: Those who have left their homes, or been driven out therefrom, or suffered harm in My Cause, or fought or been slain,- verily, I will blot out from them their iniquities, and admit them into Gardens with rivers flowing beneath;- A reward from the presence of Allah, and from His presence is the best of rewards.”