CoodaShooda, it's very simple. The source of these extracts from myself and Desert Dingo are straight from the koran.
muslims believe the koran (quran) is the divine word of God. To the muslims, the koran is God's last word to the World.
sura 33:40 "the Quran is the final authority"
Without worrying you too much, until we convert to islam we are considered to be the 'Infidels'.
Going off where Desert Dingo is from, I would say he can 'speak from authority' on what this religion is like, and I'm not suggesting he lives at Lakemba and flies out of Bankstown.
Regards Hoss.