[MitchellC]

It's a trick question to ask for 'proof' (physical evidence) for a non-physical being. The best proof there is, in my opinion, is the historicity of the events of the Christian scriptures, which brings you to the realm of 'Christian Apologetics'.

[tim politicus]

On the other hand, God the Bible takes Jesus Christ as a physical being --ecall that he was taken up bodily into ‘heaven’.

The meaning of all that is both profoundly simple and vastly complex. But leaving most of those things aside, what do you think of the following physical evidence of God:

The Christian church, which the Bible actually calls 'the Body of Christ', is a form of God (specifically Christ) on earth, and so 'proof'.

Note that Christianity is the largest, most powerful, one of the oldest and possibly fastest growing movements in human history. Is this at least some grounds for making its claim to be 'from God' a serious, if possibly arguable, contention? And isn't it a kind of physical proof of God?