Your friend saw this resource on bethinking.org and thought you should see it:
Can We Be Good Without God?
Bill Craig gives a lecture on whether we need a belief in God to be good.
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/morality/can-we-be-good-without-god
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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.