Le christianisme n’est pas une doctrine, c’est une vie.

This line is commonly presented as a concise summary of a view of Christianity that emphasizes lived faith over abstract teaching. Without a specific work, date, or surrounding passage, the original setting in Monod’s writings or sermons cannot be confirmed here.

It contrasts Christianity as something primarily practiced and embodied—shaping conduct, character, and daily choices—rather than merely a set of propositions to learn or defend.