A kink in one's theology

"I hope they won't call Mr Baxter from East Grafton here, anyhow,"said Anne decidedly.  "He wants the call but he does preach such gloomy sermons.  Mr Bell says he's a minister of the old school, but Mrs Lynde says there's nothing whatever the matter with him but indigestion.  His wife isn't a very good cook it seems, and Mrs Lynde says that when a man has to eat sour bread two weeks out of three his theology is bound to get a kink in it somewhere..."

Anne of Avonlea, by L.M. Montgomery, p203