As he was in the way. In craving epistles of the high priest, he ran headlong against Christ willingly; and now he is enforced to obey whether he will or no. This is surely the most excellent mercy of God, in that that man is reclaimed unto salvation contrary to the purpose of his mind, whom so great a heat carried headlong into destruction. Whereas the Lord suffereth him to receive letters, and to come near to the city; (whereby we see how well he knoweth the very instants of times to do everything in due time; [1] ) he could have prevented him sooner, if it had seemed good to him so to do, that he might deliver the godly from fear and carelessness. [2] But he setteth out his benefits more thereby, in that he tieth the jaws of the greedy wolf, even when he was ready to enter the sheepfold. Also we know that men's stubbornness increaseth more and more by going forward. Wherefore the conversion of Paul was so much the harder, forasmuch as he was already made more obstinate by continuing his fury. Shined about him. Because it was no easy matter to pull down [3] so great pride to break such a lofty courage, to pacify such a blind heat of wicked zeal, and, finally, to bridle a most unbridled beast, Christ must needs have showed some sign of his majesty, whereby Paul might perceive that he had to do with God himself, and not with any mortal man;. although there were some respect had of humbling him, (because he was unworthy to have Christ,) to accustom him by and by to obey, by laying upon his neck the meek and sweet yoke of his Spirit. And he was scarce capable of so great gentleness, until his cruelty might be broken. [4] Man's sense cannot comprehend the Divine glory of Christ as it is; but as God did oftentimes put upon him forms wherein he did show himself, so Christ did now declare and make manifest his divinity to Paul, and showed some token of his presence, that he might thereby terrify Paul. For although the godly be afraid and tremble at the seeing of God, yet it must needs be that Paul was far more afraid when as he perceived that the divine power of Christ was set full against him.

Footnotes

1 - "Oppportune," opportunely.

2 - "Anxietate," anxiety.

3 - "Domare," to tame.

4 - "Violenter fracta," forcibly broken.

And as he journeyed - On his way, or while he was traveling. The place where this occurred is not known. Irby and Mangles say it is "outside the eastern gate." In the Boat and Caravan it is described as about a mile from the town, and near the Christian burying-ground which belongs to the Armenians. All that we know of it is that it was near to Damascus.
And suddenly - Like a flash of lightning.
There shined round about him - The language which is expressed here would be used in describing a flash of lightning. Many critics have supposed that God made use of a sudden flash to arrest Paul, and that he was thus alarmed and brought to reflection. That God might make use of such means cannot be denied. But to this supposition in this case there are some unanswerable objections:
(1) It was declared to be the appearance of the Lord Jesus: Acts 9:27, "Barnabas declared unto them how that he had 'seen the Lord in the way;'" 1-Corinthians 15:8, "And last of all he was seen of me also"; 1-Corinthians 9:1, "Have I not seen Jesus Christ our Lord?"
(2) those who were with Saul saw the light, but did not hear the voice, Acts 22:9. This is incredible on the supposition that it was a flash of lightning near them.
(3) it was manifestly regarded as a message to Saul. The light appeared, and the voice spake to him. The others did not even hear the address. Besides,
(4) It was as easy for Jesus to appear in a supernatural manner as to appear amidst thunder and lightning. That the Lord Jesus appeared is distinctly affirmed, and we shall see that it is probable that he would appear in a supernatural manner.
In order to understand this, it may be necessary to make the following remarks:
(1) God was accustomed to appear to the Jews in a cloud; in a pillar of smoke, or of fire; in that special splendor which they denominated the Shechinah. In this way he went before them into the land of Canaan, Exodus 13:21-22; compare Isaiah 4:5-6. This appearance or visible manifestation they called the "glory of" Yahweh, is. Isaiah 6:1-4; Exodus 16:7, "in the morning ye shall see the glory of the Lord"; Acts 9:10; Leviticus 9:23; Numbers 14:10; Numbers 16:19, Numbers 16:42; Numbers 24:16; 1-Kings 8:11; Ezekiel 10:4. See the notes on Luke 2:9, "The glory of the Lord shone round about them."
(2) the Lord Jesus, in his transfiguration on the mount, had been encompassed with that glory. See the notes on Matthew 17:1-5.
(3) he had spoken of similar glory as pertain that with which he had been invested before his incarnation, and to which he would return; John 17:5, "And now, Father, glorify thou me with the glory which I had with thee before the world was"; Matthew 25:31, "The Son of Man shall come in his glory." Compare Matthew 16:27; Matthew 19:28. To this glory he had returned when he left the earth.
(4) it is a sentiment which cannot be shown to be incorrect, that the various appearances of "the angel of Yahweh," and of Yahweh, mentioned in the Old Testament, were appearances of the Messiah the God who would be incarnate - the special protector of his people. See Isaiah 6:1-13; compare with John 12:41.
(5) if the Lord Jesus appeared to Saul, it would be in his appropriate glory and honor as the ascended Messiah. That he did appear is expressly affirmed.
(6) this was an occasion when, if ever, such an appearance was proper. The design was to convert an infuriated persecutor, and to make him an apostle. To do this, it was necessary that he should see the Lord Jesus, 1-Corinthians 9:1-2. The design was further to make him an eminent instrument in carrying the gospel to the Gentiles. A signal miracle; a demonstration that he was invested with his appropriate glory John 17:5; a calling up a new witness to the fact of his resurrection, and of his solemn investment with glory in the heavens, seemed to be required in thus calling a violent persecutor to be an apostle and friend.
(7) we are to regard this appearance, therefore, as the reappearance of the Shechinah, the Son of God invested with appropriate glory, appearing to convince an enemy of his ascension, and to change him from a foe to a friend.
It has been objected that as the Lord Jesus had ascended to heaven, it cannot be presumed that his body would return to the earth again. To this we may reply, that the New Testament has thrown no light on this. Perhaps it is not necessary to suppose that his body returned, but that he made such a visible manifestation of himself as to convince Saul that he was the Messiah.
From heaven - From above; from the sky. In Acts 26:13, Paul says that the light was above the brightness of the sun at mid-day.

Suddenly there shined round about him - This might have been an extraordinary flash of the electric fluid, accompanied with thunder, with which God chose to astonish and confound Saul and his company; but so modified it as to prevent it from striking them dead. Thunder would naturally follow such a large quantity of this fluid as appears to have been disengaged at this time; and out of this thunder, or immediately after it, Christ spoke in an awful and distinct voice, which appears to have been understood by Saul only.

And as he journeyed, he came near Damascus,.... Some say it was a mile from Damascus: though, no mention is made of his obtaining letters from the high priest, only of his desiring them; yet there is no doubt but they were granted him; the design of the historian, under a divine direction, being to give an account of the temper and disposition of Saul; and he having got them, set out on his journey in high spirits, and proceeded on with the same wicked intentions, till he came near the city; where he designed to open and show his commission, and execute his wrathful purposes; but he is not suffered to go into the city with such a Spirit:
and suddenly there shined round about him a light from heaven; which exceeded the light and brightness of the sun, for it was at midday, Acts 26:13 and so the Ethiopic version here inserts this clause, "and it was noon time"; which circumstance shows that the light was very extraordinary; and it was an emblem of that inward and spiritual light which was now quickly communicated to him, light being the first thing in the new, as in the old creation; and of that Gospel light he was hereafter to spread in the world.

he came near Damascus--so Acts 22:6. Tradition points to a bridge near the city as the spot referred to. Events which are the turning points in one's history so imprint themselves upon the memory that circumstances the most trifling in themselves acquire by connection with them something of their importance, and are recalled with inexpressible interest.
suddenly--At what time of day, it is not said; for artless simplicity reigns here. But he himself emphatically states, in one of his narratives, that it was "about noon" (Acts 22:6), and in the other, "at midday" (Acts 26:13), when there could be no deception.
there shined round about him a light from heaven--"a great light (he himself says) above the brightness of the sun," then shining in its full strength.

And as he journeyed. It would require six or seven days to make the journey. It was probably made on foot.
There shined round about him a light. Brighter than the sun (Acts 26:13). It was the splendor of the glorified Savior as seen at the Transfiguration, or by John at Patmos. In order to get the full history of this revelation of Christ and Paul's conversion, we must compare the accounts given by Paul himself in chapters 22 and 26 with Luke's account here.

And suddenly - When God suddenly and vehemently attacks a sinner, it is the highest act of mercy. So Saul, when his rage was come to the height, is taught not to breathe slaughter. And what was wanting in time to confirm him in his discipleship, is compensated by the inexpressible terror he sustained. By his also the suddenly constituted apostle was guarded against the grand snare into which novices are apt to fall.