The Lord had come, of course, to save that which "had perished; " "a Physician." necessary to "the sick" "more than to the whole." This fact He was in the habit both of typifying in parables and preaching in direct statements.
What then saith Infinite Wisdom? "They that be whole need not a physician," saith He, "but they that are sick."
See how He turned their reasoning to the opposite conclusion. That is, while they made it a charge against Him that He was in company with these men: He on the contrary saith, that His not being with them would be unworthy of Him, and of His love of man; and that to amend such persons is not only blameless, but excellent, and necessary, and deserving of all sorts of praise.
After this, that He might not seem to put them that were bidden to shame, by saying, "they that are sick;" see how He makes up for it again, by reproving the others.
And the Lord was going to the feasts of sinners, so that He may have an opportunity to teach and provide spiritual food to His invited guests. Ultimately, as He was frequently described as going to feasts, it is only important what He did there, what He taught, in order to demonstrate both the humility of the Lord in going to sinners and the power of His teaching in the conversion of repentant sinners. But as for what follows: 'I desire mercy, and not sacrifice' (Hosea 6:6). And: 'I have not come to call the righteous, but sinners,' testifying of the prophet, he rebukes the scribes and Pharisees who consider themselves righteous, but reject the company of sinners and tax collectors.
(V. 10 seq.) And it came to pass, as he sat at table in his house, behold many publicans and sinners came and sat down with Jesus and his disciples. And when the Pharisees saw it, they said to his disciples, 'Why does your teacher eat with tax collectors and sinners?' But when Jesus heard it, he said, 'Those who are well have no need of a physician, but those who are sick. Go and learn what this means: "I desire mercy, and not sacrifice." For I came not to call the righteous, but sinners.''
For they do not come to Jesus while they remain in their original condition of sin, as the Pharisees and Scribes complain, but in penitence, as what follows proves; But Jesus hearing said, They that be whole need not a physician, but they that are sick.
Luke adds to repentance, which explains the sense; that none should suppose that sinners are loved by Christ because they are sinners; and this comparison of the sick shows what God means by calling sinners, as a physician does the sick to be saved from their iniquity as from a sickness: which is done by penitence.
He calls Himself a physician, because by a wonderful kind of medicine He was wounded for our iniquities that He might heal the wound of our sin. By the whole, He means those who seeking to establish their own righteousness have not submitted to the true righteousness of God. By the sick, He means those who, tied by the consciousness of their frailty, and seeing that they are not justified by the Law, submit themselves in penitence to the grace of God.
"But when Jesus heard that, He said unto them, They that be whole need not a physician, but they that are sick. But go ye and learn what that meaneth, I desire mercy, and not sacrifice: for I am not come to call the righteous, but sinners to repentance." He says, "I have not come now as judge but as physician, and for this reason I endure stench and filth." He also rebukes them for being ignorant when He says, "Go ye and learn." This means, "Since up to the present time you have not managed to learn, so at least from this time on go and learn that God prefers mercy towards sinners above any sacrifice" (Hosea 6:7). The words "I am not come to call the righteous" He spoke ironically. That is, "I have not come to call you who consider yourselves to be righteous, but I have come to call sinners. I do this, not so that they remain sinners, but in order for them to repent."
Then follows Jesus' response, wherein he gives three reasons. First, he uses a comparison: But when Jesus heard it, he said: "Those who are well have no need of a physician." The Lord calls himself a physician; and correctly so: "He heals all your diseases" (Ps 103:3), namely, of soul and body. Therefore, he refers to infirmities of body and soul; hence he says, those who are well have no need of a physician. The well are those who from pride consider themselves well; concerning these Revelation (3:17): "You say, I am rich, I have prospered, and I need nothing; not knowing that you are wretched, pitiable, poor, blind and naked." Such persons do not need a physician, but those who are weak, i.e., acknowledge their sin, as David: "For I know my transgression" (Ps 51:3).
The greatest barrier I have met is the almost total absence from the minds of my audience of any sense of sin. This has struck me more forcibly when I spoke to the R.A.F. than when I spoke to students: whether (as I believe) the proletariat is more self-righteous than other classes, or whether educated people are cleverer at concealing their pride, this creates for us a new situation. The early Christian preachers could assume in their hearers, whether Jews, Metuentes, or Pagans, a sense of guilt. (That this was common among Pagans is shown by the fact that both Epicureanism and the mystery religions both claimed, though in different ways, to assuage it.) Thus the Christian message was in those days unmistakably the Evangelium, the Good News. It promised healing to those who knew they were sick. We have to convince our hearers of the unwelcome diagnosis before we can expect them to welcome the news of the remedy.