Thinking all there is is moral relativism is a tiny baby step in the long journey of deriving your own objective basis for making moral judgements, and C.S. Lew

Thinking all there is is moral relativism is a tiny baby step in the long journey of deriving your own objective basis for making moral judgements, and C.S. Lewis's works are essentially religious allegories but with better character development, so hardly a reference that carries rhetorical weight here.