Your friend saw this resource on bethinking.org and thought you should see it:
A Little Manual for Knowing - a review
This unique introductory book is a wonderful gateway into a world of insight, inquiry and love.
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/can-we-know-anything/a-little-manual-for-knowing-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.