The premise of Islam as I understand it is that the Koran is the final version of scriptures as recited by Mohammed; this is something that I don't believe.
ok. But how does this influence your worship of the Father? Or does it?
if I don't believe in the Koran, how will I ever find essential common ground with a Koran-believing Muslim?
If youe belief regarding the status of the Koran doesn't influence your relationship with the Heavenly Father, why would it matter?
The premise of my beliefs is that Jesus Christ is the son of God, the messiah, and the one through whom forgiveness of sins is possible.
Marsh, seriously, what did Jesus teach us? He taught us to pray to the Father and ask the Father for His blessings, which is what all true worshipers do: "
Our Father who art in Heaven... forgive us our trespasses as we forgive those who trespass against us." (Luke 11:4). Jesus specifically taught us that we can expect G-d to forgive us if we forgive others:
"Forgive, and you shall be forgiven." (Luke 6:37; see also John 20:23) The implication here is obvious: We control of the effectiveness of the divine influence in our lives. Which makes perfect sense. What good is grace unless we to receive it? Faith opens the spiritual heart to healing.
This is a very basic concept that is developed in all three Abrahamic traditions: G-d wants a loving relationship with His children - with all of them. The idea of a personal G-d is present in all three Abrahamic traditions, which are sometimes referred to as "relational" religions. The evolving relationship includes a process of the person drawing ever closer to the Divine through dialogue. Starting with the Old Testament, we see it's going to mean a turning back to G-d, that is, recognizing and giving up sin in order to become reconciled. Consider Daniel 9:3-6
So I turned to the Lord God and pleaded with Him.... I prayed to the LORD my God and confessed: "O Lord, the great and awesome God, who keeps his covenant of love with all who love him and obey his commands, we have sinned and done wrong. We have been wicked and have rebelled; we have turned away from your commands and laws.
In the New Testament we also see the same theme building a relationship and drawing closer through reconciliation. Confession is an opportunity to develop the divinity within by accepting the transformative power of Grace. “
If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.” (1 John 1:9). There's no way to benefit from Grace unless you ask for it, and penitence is actually a way of asking. Note: Jesus specifically linked repentance to the immediacy of the Kingdom (See Mark 1:14-15).
In Islam, commitment is reflected in a willingness to repent: "
Except those who repent and amend and hold fast to Allah and are sincere in their religion to Allah, these are with the believers, and Allah will grant the believers a mighty reward." (The Women, 4.146) Moreover, G-d extends mercy abundantly to those "who repent and amend and make manifest (the truth)." (The Cow 2.160) Very much like the link Jesus made between repentance to the immanence of the Kingdom, the Koran reads: "
Those who repent and believe and do good shall enter the garden." (Marium 19.60)
Btw, the Koran is very clear that this principle applies to Jews and Christians. The condition specified for forgiveness and access to the Heavenly afterlife is the same as it ever was: faithfulness, that is, love of G-d and observing His standards:
Those who believe (in the Koran), and those who follow the Jewish (scriptures), and the Christians and the Sabians - any who believe in (their L-rd) and the Last Day, and work righteousness, shall have their reward with their Lord; on them shall be no fear, nor shall they grieve. (The Cow 2:62) (see also Koran 5.65).
Note that the passage specifically states that it is enough to follow the Bible. there is no reason to think a Koran-believing Muslim would require you to agree on the Koran's stature. It's right there in the very first verse!
Faith opens the spiritual heart to healing and creates a channel for dialogue. It's there in all three Abrahamic traditions, and this is probably the clearest statement I've found of it: "True worshipers will worship the Father in spirit and truth, for they are the kind of worshipers the Father seeks." (John 4:23) Do you really think the Heavenly Father cares whether the person is a Christian, Jew, or Muslim?
To my way of thinking, worship is not a doctrinal matter at all. It has nothing to do with intellectual assent. Paul doesn't think so either:
"Offer your bodies as living sacrifices, holy and pleasing to God—this is your spiritual act of worship." (Romans 12:1-2)
I hope this shows you something about
essential common ground. The Abrahamic legacy is surprisingly consistent on essential matters.