But their scribes and Pharisees murmured against his disciples, saying, Why do ye eat and drink with publicans ad sinners? And Jesus answering said unto them, They that are whole need not a physician; but they that are sick. Luke 5:30-31
These verses are part of the account of Jesus’ calling of the tax collector, Matthew (also known as Levi), as His disciple. To celebrate the occasion, Matthew invited his tax collector associates and other friends to a “great feast” for Jesus and His disciples.
The scribes and Pharisees were horrified that Jesus and His disciples would associate with such sinful people. But Jesus made it clear that He had been sent to people such as these. They needed a Savior and Deliverer. He was the Physician who could heal them of their desperate sickness known as sin. 
Jesus’ role as Physician is one of the more prominent in the Gospels. Most of His miracles were performed for people who were suffering from various physical problems-blindness, deafness, leprosy, and possession by evil spirits. But in many of these miracles, He went beyond healing the body to healing the soul and the spirit through forgiveness of sin. For example, after healing a paralyzed man, He told him, “Be of good cheer; they sins be forgiven thee” (Matthew 9:2).
Jesus the Physician is still in the healing business. He offers hope to the discouraged, His abiding presence to the lonely, comfort to the grieving, and peace to the conflicted. But most of all, He brings deliverance from the most serious problems of the human race-sin and death. The apostle Paul expresses it like this: “The wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord” (Romans 6:23).