Here's part of the commentary on this passage by Philoxenus (c. 440-523), bishop of Mabbug (Hieropolis):
|Zaccheus in the Sycamore Tree, unidentified icon|
All who were called by the Lord obeyed his summons at once, provided love of earthly things did not weigh them down. For worldly ties are a weight upon the mind and understanding, and for those bound by them it is difficult to hear the sound of God’s call.
But the apostles, and the righteous people and patriarchs before them, were not like this. They obeyed like people really alive, and set out lightly, because no worldly possessions held them bound as though by heavy fetters.
For faith’s only possession is God, and it refuses to own anything else besides him. Nothing can bind or impede the soul that senses God: it is open and ready, so that the light of the divine voice, each time it comes, finds the soul capable of receiving it.