If God were to ,(let's say) appear in sky so as to be viewed by all the people of the world(6 billion or so)?

And ask them to convert to Christianity and live your life like ,ehh .. the pope (except perhaps you can marry and do some other work to raise family). Then ,what would you do? What about free will and the process of divine(or natural) selection of good people who choose to believe on their own over people who dont believe.Then is their any meaning for the concept of belief(just as there would be not be any concept of light if there weren't any darkness). Iam not sure of the audience for this question,but this has been a doubt for me for some time and i guess i expect fellow Christians and i can sort of guess the reply from atheists...