To the various nations, however, You have sent various prophets and masters, the one for this, the other for another time. - Nicholas of Cusa

Therefore, it is you, the giver of life and being, who seem to be sought in the different rites by different ways and are named with different names, because as you are you remain unknown and ineffable to all. For you who are infinite power are none of those things which you have created, nor can a creature grasp the concept of your infinity since there is no proportion between the finite and the infinite. But you, almighty God, who are invisible to every mind, are able to show yourself as visible to whom you will and in the way in which you can be grasped. Therefore, do not hide yourself any longer, O Lord; be merciful and show your face, and all peoples will be saved who are no longer able to forsake the source of life and its sweetness when they have had even a little foretaste of them. For no one withdraws from you unless he does not know you.

With the senses man measures perceptible things, with the intellect he measures intelligible things, and he attains unto supra-intelligible things transcendently.

The goal and intent of the book of the Qur'an, is not only not to detract from God the creator or from Christ or from God's prophets and envoys or from the divine books of the Testament, the Psalter, and the Gospel, but also to give glory to God the Creator, to praise and bear witness to Christ (the son of the Virgin Mary) above all prophets, and to confirm and approve of the Testament and the Gospel. When one reads the Qur'an with this understanding, assuredly some fruit can be elicited from it