The interpretation timeline
Luke 19:4 Douay-Rheims

And running before, he climbed up into a sycamore tree, that he might see him; for he was to pass that way.

A.D. 378 – 1871 8 witnesses

Patristic

before A.D. 750
378
A.D.
Titus of Bostra Patristic
d. c. A.D. 378
“But he discovered a good device; running before he climbed up into a sycamore, and saw Him whom he had long wished for, i. e. Jesus, passing by. Now Zacchæus desired no more than to see, but He who is able to do more than we ask for, granted to Him far above what he expected; as it follows, And when Jesus came to the place, he looked up, and saw him. He saw the soul of the man striving earnestly to live a holy life, and converts him to godliness.”
Source
397
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“He has well added, that our Lord was to pass that way, either where the sycamore-tree was, or where he was who was about to believe, that so He might preserve the mystery, and sow the seeds of grace. For He had so come as that through the Jews He came to the Gentiles. He sees then Zacchæus above, for already the excellence of his faith shone forth amidst the fruits of good works, and the loftiness of the fruitful tree; but Zacchæus stands out above the tree, as one who is above the law.”
Source
735
A.D.
Bede the Venerable Patristic
c. A.D. 672–735
“Or the crowd, that is, the general habit of vice, which rebuked the blind man crying out, lest he should seek the light, also impedes Zacchæus looking up, that he might not see Jesus; that as by crying out the more the blind man overcame the crowd, so the man weak in the faith by forsaking earthly things, and climbing the tree of the Cross, surmounts the opposing multitude. The sycamore, which is a tree resembling the mulberry in foliage, but exceeding it in height, whence by the Latins it is called “lofty,” is called the “foolish fig-tree;” and so the Cross of our Lord sustains believers, as the fig-tree figs, and is mocked by unbelievers as foolishness. This tree Zacchæus, who was little in stature, climbed up, that he might be raised together with Christ; for every one who is humble, and conscious of his own weakness, cries out, God forbid that I should glory, save in the cross of our Lord Jesus Christ. (Gal. 6:14.)”
Source

Scholastic

c. 1100 – 1500
1107
A.D.
c. 1055–1107
“It is easy to turn this to a moral use. For whoever surpasses many in wickedness is small in spiritual growth, and cannot see Jesus for the crowd. For disturbed by passion and worldly things, he beholds not Jesus walking, that is, working in us, not recognising His operation. But he climbs up to the top of a sycamore-tree, in that he rises above the sweetness of pleasure, which is signified by a fig, and subduing it, and so becoming more exalted, he sees and is seen by Christ.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And when Jesus came to the place,.... Where the tree stood, in which Zacchaeus was. Christ knows where his people are, and where to find them, where they commonly dwell, or where at any time they are, he being God omniscient: besides, the bounds of their habitations are fixed by the determination and appointment of God, and were foreknown by Christ, who, before the world began, was "rejoicing in the habitable part of his earth", where he knew his saints would dwell, who are "the sons of men", with whom his delights were; and he knows where they are, when the time is come to call them: he knew Zacchaeus was in the sycamore tree, as he saw Nathanael under the fig tree, before Philip called him, Joh 1:48 and Christ comes to the very place where his people are, either in person, as here; and so he came to Galilee, and to the sea there, and walked by it, and on the very spot, where he knew he should meet with Peter, and Andrew, and James, and John, whom he called to follow him, Mat 4:13. He came to his own city Capernaum, and to the place of receipt of custom near unto it, where Matthew was, and called him, Mat 9:1 and he came to Samaria, and to Jacob's well, where he knew the woman of Samaria would be at such a time, in order to call her: or, though he comes not in person to others, where they are, yet by his word, and by his Spirit; and he comes to them before they come to him; and is found of them, and finds them, who sought him not; and is made manifest to them, who asked not for him; and in this he acts the part of the good shepherd, that leaves the ninety nine in the wilderness, and goes after that which is lost till he finds it; and agreeably to his character as a Saviour, and to the end of his coming into the world, which was to call sinners to repentance, and to seek, and save that which is lost, Luk 19:10. He looked up and saw him; he knew him, he being one of those the Father had given to him, and he had loved and undertook for, and was come into the world to seek, and to save, and now, at this time, was come hither to call by his grace. He had seen him before in the glass of his Father's purposes and decrees, he being chosen in him to grace and glory, and being a vessel of mercy, afore prepared for glory: he had seen him when he was brought into the bond of the covenant; and passed under the rod of him, that telleth all the covenant ones, as they were put into it, and given to him the Mediator of it: he had seen him among them that were lost in Adam, whom he came to recover out of the ruins of their fall in him; and now he saw him in his state of nature and unregeneracy; he saw him in his blood, and said unto him, live: this look was a look of love, grace, and mercy; he looked upon him, and loved him, and was gracious to him, and had compassion on him; and it was a distinguishing look, he looked on him, and not on others. There was a great crowd both before and behind him, and all about him; but he looked not on these, but he looked up to Zacchaeus. And he said unto him, Zacchaeus; he knew him, and could call him by his name, as he did Saul, when he called him, and revealed himself to him. His name was written in the Lamb's book of life, and so must be known to Christ, who was present at the making of that book, and was concerned in setting down the names in it, and has it in his keeping: he was one of the sheep the Father had given him, he came to lay down his life for, and of whom he had such perfect knowledge, as to call them by name, as he does all the chosen and redeemed ones; see Isa 43:1. It must be very surprising to Zacchaeus to hear Christ call him by his name, who was an utter stranger to him, and whom he had never seen before; and it is a very considerable instance of the omniscience of Christ, as well as of the great condescension and affectionate regard he has to his own, and the familiar way in which he uses them. Make haste, and come down; from the tree. The dangerous estate and condition of a sinner requires haste; it is like that of Lot in Sodom, when it was just going to be destroyed; and like that of the manslayer, when pursued by the avenger of blood; both whom it became to escape for their lives, and flee for refuge as fast as they could: and so it became Zacchaeus to come down with all speed to Christ, who was come hither to call and save him; and the enjoyment of Christ, and his grace, calls for haste; see Joh 11:28. Such who come to Christ must quit all their exalted thoughts of themselves, of their riches, fulness, and self-sufficiency, and come to him as poor and needy, for such only he fills with his good things; and of their health and soundness, and come to him the great physician, as sick and diseased; and of their purity and goodness, holiness and righteousness, and come to him as sinners: but it must be mighty grace to cast down imaginations, and high things, that exalt themselves against Christ, and the knowledge of him, and to humble a proud sinner, and bring him to the feet of Jesus. For this day I must abide at thy house; for a little while; not so much for the sake of refreshment for himself, and his disciples, as for the good of Zacchaeus; to make known the great salvation to him, and to bestow his grace upon him, and converse with him in a spiritual way.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“He ran before - The shortness of his stature was amply compensated by his agility and invention. Had he been as tall as the generality of the crowd, he might have been equally unnoticed with the rest. His getting into the tree made him conspicuous: had he not been so low of stature he would not have done so. Even the imperfections of our persons may become subservient to the grace of God in our eternal salvation. As the passover was at hand, the road was probably crowded with people going to Jerusalem; but the fame of the cure of the blind man was probably the cause of the concourse at this time.”
Source
1863
A.D.
1871
A.D.
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.