Luke 19:8

And that thou mayest learn that this is, above all, a house's adorning, enter into the house of Zacchaeus, and learn, when Christ was on the point of entering therein, how Zacchaeus adorned it. For he did not run to his neighbors begging curtains, and seats, and chairs made of ivory, neither did he bring forth from his closets Laconian hangings; but he adorned it with an adorning suitable to Christ. What was this? "The half of my goods I will give," he saith, "to the poor; and whomsoever I have robbed, I will restore fourfold." On this wise let us too adorn our houses, that Christ may enter in unto us also. These are the fair curtains, these are wrought in Heaven, they are woven there. Where these are, there is also the King of Heaven. But if thou adorn it in another way, thou art inviting the devil and his company.

(Hom. de caec. et Zacc.) And so it happened here, for the publican was converted, and lived a better life. Zacchaeus stood, and said unto the Lord, Behold, Lord, the half of my goods I give to the poor; and if I have defrauded any man, I restore him fourfold. Behold here is a marvel: without learning he obeys. And as the sun pouring its rays into a house enlightens it not by word, but by work, so the Saviour by the rays of righteousness put to flight the darkness of sin; for the light shineth in darkness. Now every thing united is strong, but divided, weak; therefore Zacchaeus divides into two parts his substance. But we must be careful to observe, that his wealth was not made up from unjust gains, but from his patrimony, else how could he restore fourfold what he had unjustly extorted. He knew that the law ordered what was wrongly taken away to be restored fourfold, that if the law deterred not, a man's losses might soften him. Zacchaeus waits not for the judgment of the law, but makes himself his own judge.

If we examine more closely, we shall see that nothing was left of his own property. For having given half of his goods to the poor, out of the remainder he restored fourfold to those whom he had injured. He not only promised this, but did it. For he says not, "I will give the half, and I will restore fourfold," but, "I give, and I restore."

We have two kinds of goods in us, bodily, and spiritual; the just man gives up all his bodily goods to the poor, but he forsakes not his spiritual goods, but if he has extorted any thing from any one, he restores to him fourfold; signifying thereby that if a man by repentance walks in the opposite path to his former perverseness, he by the manifold practice of virtue heals all his old offences, and so merits salvation, and is called the son of Abraham, because he went out from his own kindred, that is, from his ancient wickedness.