Religious concern pervades Wittgenstein’s writings although not at the foreground. The paper first underlines both the variety of Wittgenstein’s views on religion and the seminal role of his mystical experience of the war in the building of these views. Then it suggests an interpretation of the “harmony” between Wittgenstein’s religious point of view and his philosophy of language and mind. This interpretation relies on the concepts of aspect’s change (Aspektwechsel) and conversion (Bekehrung).