Proof of God. It remains an interesting, even a dangerous idea and question for exiting traditions. And if such a proof existed, the impact on religion could only be severe. For a start, any authentic proof could only be 'revealed' by God and be confirmed by God. The theological construct we call religion 'presumes' a revelation with the existing scriptural record, but the process of interpretation has been one of the most divisive and bloody projects of human history. Not really the stuff of truth.
The promise of the Incarnation to end evil has yet to be realized. Thus any revealed proof must also offer the potential for moral progress not yet possible under the existing faith paradigm. Such a proof would thus resolve the 'Theodicy' question.
The existing scripture record contains many references to false teaching, false interpretation, antichrists, even a great deceiver. Yet as all tradition is theological, it is impossible to know why one might be more 'true' than another. Such a proof would resolve that ancient question. But also expose the fact that the last two thousand years of theological exegesis are a human intellectual self deception.
The 'church' often speaks of searching for God but with nothing definitive to 'search and find' within tradition, the expression remains hollow.
The ascendency of atheism has brought the idea to the forefront of many discussions. Their main argument is the lack of direct evidence which the church cannot provide to sustain their truth claim. In that sense,the faith of tradition today is not in Jesus or God but the theological interpretations of men. To presume than natural reason has successfully understood the mind of God is the gamble of faith.
If there is in fact a omnipotent, omniscience God, the idea of a direct moral proof, realized and confirmed by faith sounds a lot more rational then what tradition has to offer. I have no problem imagining such potential. At a time when the world is desperate for change, peace and justice, I can think of no better catalyse for such change than for such a proof to be revealed.
Maybe that's what the 'second coming' will bring? Or as Dante wrote in his Divine Comedy:
For as I turned, there greeted mine likewise
What all behold who contemplate aright,
That's Heaven's revolution through the skies.