Rather than answering with Hank Hanegraaf’s response of “It’s not about how could He let me go to Hell, but how could he allow me to go to heaven?” Dr. Alan Cairns answers in another way:
“He will be glorified in everything, therefore He will be glorified even through the condemnation of the unregenerate. Who am I to ask such questions?”
Either way, both are valid answers (although Hank’s is more appropriate from an apologetic standpoint).
