Knightly’s judgment with him being introduced to us as a “sensible man”. Though Emma while being an intimate and old friend of Mr. Knightly 's has no reason to distrust him either at times feels that his judgments can be overly harsh or wrong at times. We the reader are told as much in the first chapter through a quick peek inside Emma 's head through indirect discourse
“Mr. Knightley, in fact, was one of the few people who could see faults in Emma Woodhouse, and the only one who ever told her of them: and though this was not particularly agreeable to Emma herself, she knew it would be so much less so to her father, that she would not have him really suspect such a circumstance as her not being thought perfect by every body.”
Though Emma may not always agree with his criticisms and judgments Mr. Knightley ends up being correct in his assessments. When it comes to the matter of Frank Churchill character there is no change in this