Your friend saw this resource on bethinking.org and thought you should see it:
Unbelievable? - a review
Justin Brierley reflects on why he is still a Christian after ten years on hosting debates with atheists
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/is-christianity-true/unbelievable-review
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bethinking.org is a collection of resources which aims to make sense of the big questions of life about God, Jesus and Christianity.