[danjc]

The bible reveals that the basic problem humanity has is not lack of a robust life philosophy but rather that we're inherently sinful and thus deserving of death (physical and eternal). That's an offensive message.

It then explains that the remedy to the judgement we deserve is believing in Jesus Christ, who by bearing that judgement, causes our sin to be imputed to himself and his righteousness to be imputed to us. Accepting this requires us to admit we are totally helpless and at God's mercy. That's an even more offensive message.