Paul is rebuking the Corinthians for their sinful behavior. "Walking" here is a metaphor for "judging your behavior," deciding what is good and bad. Alternate translation: "you should be ashamed because you are behaving according to your sinful desires and you are using human standards to decide whether your behavior is good or bad!" (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-metaphor]])