This is a pressing subject for Christian mission today: What God do we believe in?
The Apostle Peter writes (NIV 1 Pet. 1:18-21):
18For you know that it was not with perishable things such as silver or gold that you were redeemed from the empty way of life handed down to you from your forefathers, 19but with the precious blood of Christ, a lamb without blemish or defect. 20He was chosen before the creation of the world, but was revealed in these last times for your sake. 21Through him you believe in God, who raised him from the dead and glorified him, and so your faith and hope are in God.
It is through Jesus that we believe in God. Any god without Jesus is a false god.
It is probably the secular world and philosophy that has grouped religions as Judaism, Islam and Christianity as all believing in ‘God’.
Orthodox/conservative believers of all three faiths are well aware of the differences.
On one level it is a mere terminological issue. The recent Muslim controversy in Malaysia over whether Christians could be allowed to call God ‘Allah’ (which means ‘God’) is a case in point.
On another level the cross where the God-man Jesus died is an offence – even to liberal Christians. The result is that the concept of God hovers above and beyond anything ‘revealed’ in any specific religion. Since this is supposedly the case, all fumblings in the dark about God (such as in the Quran, the Bible etc.) all lead to the same God. In my estimate there are more such deists about than atheists.
Would it not be helpful to abolish the word ‘god’ as the generic term for some higher force? Possibly.
What is more pressing however is for Christians to emphasise that we believe in the triune God who is Father, Son and Holy Spirit and that we believe that he is the only God.
The Gospel flows naturally out of that fact.
See this clip with Rev. Dr. Paul Blackham on the subject: