"The Christians believe that Jesus Christ died to save man. With you it is belief in a doctrine, and this belief constitutes your salvation. With us doctrine has nothing whatever to do with salvation. Each one may believe in whatever doctrine he likes; or in no doctrine."

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I wish to propose for the reader's favourable consideration a doctrine which may, I fear, appear wildly paradoxical and subversive. The doctrine in question is this: that it is undesirable to believe a proposition when there is no ground whatever for supposing it true.

— Bertrand Russell