For the Son of Man came to save that which was lost.
The disciples asked who would be greatest in the kingdom, not from hunger for holiness but for name and rank. They had dreamed of a temporal kingdom with external pomp and power, fastened upon Christ's words of glory while forgetting His sufferings. Many love to hear of privileges and crown while overlooking the yoke and cross.
AI summary
Commenting on Matthew 18:1-35
Matthew 18:11. For the Son of man cometh Christ now employs his own example in persuading his disciples to honor even weak and despised brethren; for he came down from heaven to save not them only, but even the dead who were lost It is in the highest degree unreasonable that we should disdainfully reject those whom the Son of God has so highly esteemed.
For the Son of man is come to save that which was lost--or "is lost." A golden saying, once and again repeated in different forms. Here the connection seems to be, "Since the whole object and errand of the Son of man into the world is to save the lost, take heed lest, by causing offenses, ye lose the saved." That this is the idea...