The Apostle's love for the Gospel and zeal for its spread reached the point of self-forgetfulness. For this he first gave himself over to death, and regarded himself as one appointed to death (1 Cor 4:9).
Therefore there was no need to be concerned for anything necessary for life, or even for life itself, provided only that the word should have success.
"He asks nothing properly for himself, but everything for God" (Theophylact). He asks "not that he may avoid dangers, for he had devoted himself to this. He lies under this, as was said in the first epistle (1 Thess 3:3), but that the word of God may run" (Chrysostom).
He asks "that the preaching of the Gospel may run and be received by all with faith" (Oecumenius).
The word of the Lord is the word of God (1 Thess 2:13). It is what the Lord Himself handed down to the Apostles, commanding them to teach it to all nations. It is the same as the Gospel.
You are under the wrath of God because of the ancestral transgression and your own sins. Behold, we preach good tidings of joy to you: the Son of God died for us and turned away God's wrath on our behalf.
Believe, and you will be received into God's mercy and His grace, so as to please Him.
"May it run," that is, may it spread unhindered and swiftly, meeting no obstacles and being constrained or stopped by nothing (2 Tim 2:9). As some majestic river flows, spreading broadly, so may the Gospel preaching flow through the mouths of the Apostles and water the whole earth.
"And be glorified," that is, may it show its glorious and beneficial actions upon minds, hearts, and morals. May it be honored for this as something great, wondrous, and divine, first among you, and then through you among all.
No earthly glory accompanied the word of God everywhere, while the Lord worked with it and confirmed the word by the signs that followed (Mk 16:20). But this was external glory. More glorious was this: when those who believed the word received grace and were renewed.
Since this is the goal of the word, and the path to it is faith, the Apostle, in asking prayers for the glory of the word, asks them to pray that the hearts of all may open to receive the word by faith.
Through this they would draw wondrous overshadowings of grace. This is properly the glory of the word, not so dazzling, but powerful in action.
Those counted worthy of this themselves marveled and said: see what the word has done in me. Others too marveled and said: look what the word has made them.
"Just as also among you." Oecumenius says: "just as among you it ran and was believed." Theophylact says: "that all may submit to it just as you did."
This is Saint Paul's own testimony that among the Thessalonians his preaching quickly spread, attracted many, and produced glorious effects. Both the Thessalonians themselves and outsiders who saw their faith glorified it.
Here is praise of the Thessalonians, says Chrysostom, for their swift conversion and attachment to the faith. It is great praise.
Remembering how quickly and easily faith had been established among them, and how many objectors it was meeting in Corinth, he rests with joy on the first and desires deliverance from the latter.
He speaks as though saying: you are better than the Corinthians. May God grant that the Corinthians and those around them, and all everywhere, may be the same as you.
Anyone can see how fitting this praise is here for the Apostle's purpose of disposing the disorderly to correction. The thought is clear: you are so glorious. Do not allow there to be among you disorderly people who disgrace the whole community by their undisciplined conduct.