Matthew 9:12
But when he heard it, he said, Those who are well have no need of a physician, but those who are sick. The physician analogy: physicians are found with the sick, not the healthy, because the sick are who need them. The objection to Jesus eating with sinners is the same as objecting to a doctor treating patients — the doctor must go where the sickness is. The Pharisees' commitment to purity through separation keeps them from the sick; Jesus' commitment to healing through engagement brings him to them. Luke 19:10 says the Son of Man came to seek and save the lost — the lost are where he goes, not the found.