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Christ died"--that is history; "Christ died for our sins"--that is doctrine. Without these two elements, joined in an absolutely indissoluble union, there is no Christianity.

John Gresham Machen (1923). “Christianity and Liberalism”, p.27, Wm. B. Eerdmans Publishing
Christ died--that is history; Christ died for our sins--that is doctrine. Without these two elements, joined in an absolutely indissoluble union, there is no Christianity.