We can actually deduce here that judging from the descriptions of the Friar and the Parson, we see that what Chaucer thinks that can cause a religious person to fail in his or her duty are: Materialism, gluttony, bribery, and mistruths.
Geoffrey Chaucer was actually known to be an author, a poet and a civil servant. He was known for his book, 'The Canterbury Tales'. Chaucer has been called the "father of English poetry".
We see that when Chaucer examined the faults of Friar, he discovered that there are things that can make a religious man to stray. Such things are stated: materialism, gluttony, bribery, and mistruths.
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