What do you think is the most philosophical sentence in Jin Yong's novels?

Zhang Cuishan and his wife, Yin Susu, visited Zhang Sanfeng, a master in "The Dragon Slayer with Eternal Feelings". Zhang Cuishan was worried that his wife was born in a cult, and the master would not accept it. But Zhang Sanfeng said with a smile, what does that matter? As long as the wife has a good character, she has a bad character. Can't she have a subtle influence when she comes to our mountain? Where's Skyhawk? Cuishan, don't be too narrow-minded to be the first person. Don't pretend to be a noble and decent person and look down on others. The word "good and evil" is inherently difficult to distinguish. If a decent disciple has evil thoughts, it is evil. Evil factions are gentlemen as long as they do good deeds wholeheartedly. Seeing this, I have to admire Zhang Sanfeng's open-minded and heroic character. I think this sentence has also become the core theme of later martial arts novels to explore the relationship between good and evil. In later novels, many decent people do evil under the banner of justice, but most of them are chivalrous, brave and enthusiastic. Although this model looks very cliche now, I think its original intention is worth pondering.