To confirm the oneness we had given five proofs and they were its intellectual proofs and we can present some proofs from oft repeated traditions. To prove and confirm God’s existence and the acceptance of the Messenger’s ministry and his truthfulness it is imperative that all that has been said in the Qura’n should be above refutation. We are now sure that there is nothing untoward in the Book.
We can take the help of the Qura’nic verses to confirm the Oneness and it is full of such verses. No topic has been as largely discussed as Tawhid
Allama Majlisi writes in Behar-ol-Anwar about this subject, “there are umpteen Hadith in the books and Sunni about the proof of Oneness in Qura’n and Hadith and nothing can prevent us from be attached to those proofs.” He then adds, “I think that the best argument in favor of confirmation of Oneness is that which is taken from Qura’n and Hadith”. (Al Daleel Naqli) (1) It is evident without saying that the proof through the books does not contradict the intellectual and confirmed proof because the base of the intellectual proof is in the books and Sunnah. We can therefore say that the source of origin of both the intellectual and the extracted proof (from the books) is the same, the Qura’n and the Sunnah.