And Jesus said unto him,
This day is salvation come to this house, since he also is a son of Abraham.
Read Chapter 19
Augustine of Hippo
“The Son of man came to seek and to save what was lost.” All were lost. From the moment the one man sinned, in whom the whole race was contained, the whole race was lost. One man without sin came. He would save them from sin.
And Jesus said unto him. In answer to his words, but so that he might, appear to direct His face and voice not so much to him, as to the disciples and the multitude who stood by. There is a like enallage in Romans 10:2; Psalm 3:3, and elsewhere.
This day is salvation come to this house. "Condemnation," says Euthymius, "which used to inhabit there, from its avarice having been turned out." The Arabic has "This day is salvation come to the dwellers in this house." "To this house." From this it appears that when Zacchus believed and was converted, all his household followed his example, and believed in Christ, repented, and were justified and sanctified. Moreover, Zacchus after his conversion, and the Resurrection and Ascension, became an attendant of S. Peter, and was ordained by him Bishop of Csarea in Palestine. S. Clim. Recognitions, lib. i3.
Forsomuch as he also is a son of Abraham. Because he followed the faith, righteousness, and holiness of Abraham. For by suffering, says Bede...
Finally, he also calls sons of Abraham those whom he perceives are active in helping and nourishing the poor. Zacchaeus said, “Behold, I give one half of my possessions to the poor, and if I have defrauded anyone of anything, I restore it fourfold.” Jesus responded, “Today salvation has come to this house, since he too is a son of Abraham.” If Abraham believed in God and it was accounted to him as righteousness, then he who gives alms according to the command of God certainly believes in God. He that possesses the true faith keeps the fear of God. Moreover, he keeps the fear of God by showing mercy to the poor. ...
Zacheus is here styled a son of Abraham; i.e. his spiritual son, a partaker of the promises made to Abraham concerning the Messias: not that he was actually born of his seed, but because he imitated his faith; and as Abraham at the voice of God, left the land and house of his father; so Zacheus renounced his goods and possessions, by giving them to the poor. (Ven. Bede) ...