I was chatting with an associate of mine about how an empirical error in the doctrine of a religion correlates to an error of the religion itself. In any case, it has occurred to me (even before this chat...it's just that this chat spurred me to write this thread) that there is such an error in Islam. Herein lies the error (I am pulling this from St. Bonaventure's "Journey of the Mind into God)":
1. Muslims believe that God is one both in substance and in hypostasis (person).
2. Muslims believe that God is perfect. This is to say, no greater God can be conceived.
3. It is apparent both to the Muslim and to me from the creation of this, the best possible world, that God desires to express His Goodness.* Further, even if it were not empirically obvious, it should nonetheless be obvious to the Reason (see Plato's Timaeus
* By express, I mean it in this way: red food dye makes cake icing red. The redness of the food dye is reflected in the redness of the cake icing. Likewise, God is Good. God desires to see that Goodness reflected by some communication of that Goodness.
These 3 things a given, it is evident that the Muslim faith is incoherent. This is to say, their beliefs result in a contradiction. Since their beliefs result in a contradiction, it is evident that either the Muslim faith as a whole is right (but this one belief or those several beliefs are wrong), or the entire faith is wrong. In this case, the former cannot be the case, since the beliefs in question which result in the contradiction are either obvious (as is the case in 2 and 3) or central to the Muslim faith (as is the case with 1). Therefore, if I can demonstrate that the beliefs result in a contradiction, it must be admitted that the Muslim faith as a whole is an error.
If God performs an action, then God must perform the action in the best possible way (from 2). If He does not perform the action in this fashion, then a better God can be conceived, namely a God Who has performed the action in the best possible way. For this reason, no man who believes in the second proposition (as the Muslims believe and I believe) may believe that this world is not the best possible world. God has created the world, and therefore His act of creating the world must have been the best possible. IE, this is the best possible world.
Yet, the Muslims (and I suppose the Jew) say that God expresses His Goodness only in the creation of the world (from 1 and 3). Either, therefore, no greater expression of God's Goodness is conceivable, or Islam becomes incoherent.
But look! A greater expression of God's Goodness is
conceivable. The most perfect conceivable expression of God's Goodness is an entire communication of the Divine Substance in a new hypostasis. Quoting St. Bonaventure:
Itinerarium Mentis in Deum 6:2 wrote:
Itinerarium Mentis in Deum
However a most high diffusion cannot be, unless it be actual and intrinsic, substantial and hypostatic, natural and voluntary, liberal and necessary, unfailing and perfect. Therefore unless there be eternally in the Most High Good an actual and consubstantial production, and a hypostasis equally noble,8 as is one producing through the manner [per modum] of generation and spiration - so that there be an eternal (production) of an eternally co-beginning principle - so that there would be a beloved [dilectus], a co-beloved [condilectus], a begotten and a spirated, that is, the Father and the Son and the Holy Spirit; it would never be the Most High Good, because it would not diffuse itself most highly. For diffusion in time [ex tempore] into creatures is not but as a center and/or point in respect of the immensity of the eternal Goodness;9 whence any diffusion can also be thought greater than that, namely that, in which diffusing itself it communicates to the other its whole substance and nature. Therefore it would not be the Most High Good, if it were able in reality [in re], and/or in understanding [intellectu] to be lacking.
Look! The Muslim beliefs necessarily result in a contradiction. 2 and 3 demand that in God there be a plurality of hypostases (persons...ideally 3) in a single substance. Yet, they flatly deny this in 1.
Islam is fundamentally incoherent.
On that note, this may also demonstrate the error of Mormonism.