NOTES for Luk 19:1-27
If earlier Jesus displeased pious people by associating with tax collectors, that is, tax farmers, and sinners, those who openly did not keep the law, now He crosses every boundary: He enters the house of the chief extortioner and declares forgiveness of sins to him simply because he promised to change his ways. He explains this by saying that Zacchaeus too is, after all, a "son of Abraham." In that language this means that he too is a human being, that God created him for Himself, for life and joy.
In theory, we too know that "man is created for happiness," but for us humanity is still divided into those who have deserved this happiness and those who have not, into the worthy and the unworthy. We ourselves, of course, end up among the "better part"; that is why the Pharisees, like all normal people, "began to grumble" when Christ turned out to be in the house of a "sinful man." The Lord knows how to see a human being in everyone, and this is a skill that should be learned.