And Jesus answered them, “Those who are well have no need of a physician, but those who are sick. I have not come to call the righteous but sinners to repentance.” (Luke 5:31-32)
Jesus is making a very pointed statement here.
The Pharisees, in their pride, sought to discredit and marginalize Jesus for eating and drinking with the tax collectors and sinners, but by their question it is made clear how blind these men were to their own sin. While pointing towards the sin of others the Pharisees failed to recognize or admit their own sin.
Jesus, in response to the Pharisees question, says..."those who are well have no need of a physician." Jesus then goes on to tell them that he came to call the sinners towards repentance and not the righteous. But here's the catch: the Bible clearly states that, there is none righteous...not even one (Romans 3:10-12). Therefore, what Jesus is really saying to the Pharisees is, only the people who see and admit their own sin will be saved.
"For everyone who exalts himself will be humbled, and he who humbles himself will be exalted.” (Luke 14:11)