"Some readers allow their prejudices to blind them. A good reader knows how to disregard inappropriate responses"

This quote by John Barton is highlighting the value of being an unbiased reader. It is suggesting that some readers allow their own personal predispositions and preconceived notions to cloud their judgement and prevent them from seeing the true meaning of a text. A great reader, nevertheless, is able to recognize these predispositions and set them aside in order to gain a much better understanding of the text. This requires the reader to be familiar with their own prejudices and to be happy to look beyond them in order to gain a more precise analysis of the text. By doing this, the reader is able to acquire a more detailed understanding of the text and its true significance.