[kosta50]

Honesty has nothing to do with how true a particular religion is, and C. S. Lewis naïvely links the two when he says that no honest man will want to believe Christianity if it is untrue—because no one can know for sure if it is or isn't true.

In fact, this distinction illustrates a major aspect of Christ’s victory over Satan

The evil seems to be alive and well 2000 years after this "victory". You are drifting off the topic.

[reasonisfaith]

Lewis simply meant that a man’s level of honesty comes from his heart. That is, the honest man wants to conform his beliefs with external truth—truth independent of the man.

The presence of evil you describe as “alive and well” doesn’t refute the Biblical prophecy which defines Christ’s victory over Satan as absolute and final. In fact, it corroborates it.