39-40He quoted a proverb: "'Can a blind man guide a blind man?' Wouldn't they both end up in the ditch? An apprentice doesn't lecture the master. The point is to be careful who you follow as your teacher.
41-42"It's easy to see a smudge on your neighbor's face and be oblivious to the ugly sneer on your own. Do you have the nerve to say, 'Let me wash your face for you,' when your own face is distorted by contempt? It's this I-know-better-than-you mentality again, playing a holier-than-thou part instead of just living your own part. Wipe that ugly sneer off your own face and you might be fit to offer a washcloth to your neighbor.