Title: If a man gains the whole world
No one can attempt to own the whole world by way of rejecting the idea that the Messiah had to suffer, and a disciple has to suffer after Him also, and not lose something better, which is the prospect of eternal bliss.
Denying God may bring temporary relief from persecution, even exempt us from the shame and agony of a lingering death on a cross, but at a cost which would far exceed the value of gaining the whole world, if that were possible.