It is not unusual to hear learned theologians argue for the inscrutability of God, but this position usually is a smokescreen that serves to halt opposing arguments. He implies that further debate is rebellion against God but it probably means his own argument is flimsy and can’t be supported.
Fundamentally, all our theology stands on the scrutability of God. We do not worship mystery; what would that mean? We worship God because he is good and loving and reliable and sovereign, and full of grace. We worship God only to the extent that we understand him. To recognize that his power and wisdom go beyond our understanding does not imply inscrutability. In fact, we are confident that what is not revealed is consistent with what is revealed. The fact that we possess and treasure the Bible implies also that God is deeply interesting in revealing himself to us. – E.O.