Your friend saw this resource on bethinking.org and thought you should see it:
No God? No Good
Theism and naturalism are contrasted with respect to furnishing an adequate foundation for the moral life. It is shown that on a theistic worldview an adequate foundation exists for the affirmation…
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/morality/no-god-no-good
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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.