You rationalize away quite legitimate intuitive perception at such times.

在这种时候，你合理化了相当合理的直觉。

I knew, by instinct, how the matter stood, before St. John had said another word; but I cannot expect the reader to have the same intuitive perception, so I must repeat his explanation.

凭着直觉，在圣约翰再说一句话之前，我就知道事情是怎么回事了。但我不能指望读者有同样的直觉，所以我必须重复他的解释。