Zacchaeus was a wee little man

Anyone who is chief among many in wickedness is little in spiritual stature, for the flesh and the spirit are opposites to one another, and for this reason he [Zacchaeus] cannot see Jesus for the crowd. Crowded in by a multitude of passions and worldly affairs, he is not able to see Jesus acting, moving, and walking about. Such a man as this cannot recognize Christian acts for what they are, namely, Christ acting and moving in us. But such a man, who never sees Jesus passing by and cannot perceive Christ in Christian acts, will sometimes change from negligence and come to his senses. Then he will climb up to the top of the sycamore-fig, passing by every pleasure and sweetness, as signified by the figs, and counting them as foolish and dead. Becoming higher than he was and making ascents in his heart, [Ps. 83:6] he is seen by Jesus and can see Jesus, and the Lord says to him, Make haste, and come down, which means, Through repentance you have ascended to a higher life; come down now through humility lest pride and high mindedness make you fall. Make haste, and humble yourself. If you humble yourself, I must abide at your house, for it is necessary that I abide in the house of a humble man. Upon whom shall I look, if not upon him who is humble and meek, who trembles at My words? [Is. 66:2] Such a man gives half of his goods to the destitute demons. For our substance is twofold: flesh and spirit. The righteous man imparts all his fleshly substance to the truly poor, the demons who are destitute of everything good. But he does not let go of his spiritual substance, for as the Lord likewise said to the devil concerning Job, Behold, I give into thine hand all that he has, but touch not his soul. [Job 1:12] And if he has taken any thing from any man by false accusation, he restores it to him fourfold. This suggests that if a man repents and follows a path that is opposite to his former way of wickedness, he heals his former sins through the four virtues, and thus he receives salvation and is called a son of Abraham. Like Abraham, he also goes out of his land and out of his kinship with his former wickedness and out of the house of his father, meaning, he comes out from his old self and rejects his former condition. He himself was the house of his father, the devil. Therefore, when he went out of the house of his father, that is, when he went out of himself and changed, he found salvation, as did Abraham.
Blessed Theophylact