Having arranged the wondrous manner of salvation for all in the incarnate divine economy, in the death on the Cross of the Incarnate One, He did not allow it to remain unknown. He chose a special preacher of it and sent him into the whole universe to teach the Gentiles to believe in it.
Chrysostom sees precisely this motive in the Apostle's mention of his appointment. He says: "The Apostle said of himself that he was chosen as teacher of the nations, hinting that now grace has been poured out everywhere in the universe."
He also connects this exhortation with the command to pray for the Gentiles: "Since Christ suffered for the Gentiles, and I have been chosen as teacher of the nations, why do you not pray for them?
Do you see grace poured out abundantly? Among the Jews, prayers were not offered for them, but now grace has extended even to them."
In the words "preacher," "Apostle," and "teacher," our interpreters observe a certain progression, though the work was one. Blessed Theophylact writes: "I have been appointed preacher of this testimony, to preach concerning it, that is, concerning the Cross and death of Christ the Lord.
And I have not been appointed simply as a preacher, to preach in one place, but also as an Apostle, an envoy, so as to go everywhere with the preaching."
Oecumenius completes this: "Since one can preach even in passing, he added, teacher. He says: I was not content to deliver a single sermon, but taught persistently until I had instructed them.
By this I showed God's special care for the Gentiles."
Why did the Apostle insert into the speech about his appointment the words of assurance: "I speak the truth in Christ, I do not lie"? Saint Timothy was Saint Paul's beloved disciple and knew everything. Therefore there was no need to speak so for his assurance.
But the Apostle could have said this with the implied phrase, as you know. He may have said it for the same reason that people living soul to soul sometimes repeat to one another what they know and have already repeated several times.
It is pleasant to remember and recount such things. Yet one may also suppose that, when writing this, the Apostle had the Ephesians in mind. Saint Timothy, of course, was not to hide the Epistle from them.
It was by no means superfluous to say this to the Ephesians, for not all of them had yet believed. Among those who had believed, not all had been converted by Saint Paul, and many believed after him.
For such people these words placed the seal of divine authority: for some, upon truths already believed, and for others, upon truths offered for faith.
It is worth noting that this assurance does not refer to Saint Paul's having been appointed an Apostle in general, but to his having been appointed Apostle and teacher specifically of the Gentiles.
This could not fail to be pleasant and attractive to the Gentiles, of whom the Church of Ephesus chiefly consisted. It could not fail to act soothingly upon their faith.
Resting in this faith, they could stand without wavering against doubts blown in from outside by the pagan vain wisdom widely spread in Ephesus.
The words "in faith and truth" indicate either the subject of preaching and teaching: I am teacher of the nations, appointed to teach them faith and truth (see Ambrosiaster). Or they indicate the character of the teaching.
I do not teach speculation, but faith. I do not prove my teaching by speculations, but offer it to faith, assuring that it is true.
"I preach, not armed with syllogisms or logical demonstrations, and not clothing my teaching in rhetorical subtlety, but offering it to faith. Yet lest anyone think some deception is offered for belief, he added: in truth.
Although I offer it to faith, what is offered is true. What is taught, though taught to faith, is taught in truth. Those capable of faith believe, and by this the power of the preaching is proved" (paraphrase from Chrysostom, blessed Theophylact, and Oecumenius).
Blessed Theodoret writes: "Of this mystery, that is, the salvation of all by the death of the Lord on the Cross, I have been appointed preacher and Apostle, says Paul. I offer it to all with fitting faith and truth, because I confirm the words by wonderworking."
The thought is the same as was set forth above, with a certain nuance. The teaching is not only faithful and true, but also attested. I also present documents of attestation.