Wants a proof that Quran is God's word

You’re welcome, DavidC,

All the errors that occur in all the books only in the human alone, therefore, Allah revealed the Quran with the original language of the Prophet Muhammad, so that its authenticity is maintained from counterfeiting. And the possibilities differ only in the translation, because of the language differences of each country.

All the books revealed to His messengers are basically divided into two main factors:

1. Tawheed: meaning that they are commanded to invite their people to worship only to one God (Allah).

2. Shari'ah: it means all the ordinances associated with doing various worship:

a. Its relationship to the ordinance of worshiping to their Lord as it has exemplified by his Apostles.

b. Its relationship with all human beings, for example: to do good to humanity, to bring people to the light of righteousness from their God in wise ways, to reject all bad characteristics in good ways except in situations of forced like when aqidah will be changed and expelled from their countries (colonized).

In the teachings of Islam, all Muslims must be firmly guided to the Quran so that if there is difference of opinions then they must return to refer to the authentic source that is Al Quran, that is why almost all Al Quran always contains the original language besides its translation.

Apart from that, the Qur'an also contains many of the words of Allah that informing about the past events, present and future including intuitions that will be useful for the development of science of mankind which have been contained in the Qur'an which was revealed around 14 centuries ago. On that basis Allah will not bring down His book again after the Quran.