2 sn The issue here is inappropriate associations. Jews were very careful about personal associations and contact as a matter of ritual cleanliness. Their question borders on an accusation that Jesus is ritually unclean.
3 tn Here δέ (de) has not been translated.
4 sn Jesus’ point is that he associates with those who are sick because they have the need and will respond to the offer of help. A person who is healthy (or who thinks mistakenly that he is) will not seek treatment.