Here he states only the general position about this. The righteousness of God is possible and appears in deed only through faith in Jesus Christ.
By "faith in Jesus Christ," he gives us to understand the whole New Testament divine economy of salvation, appropriated by sincere and heartfelt faith in the Lord.
Theodoret writes that by these words "what was said before is repeated, so that what was lacking may be completed.
"Since the Apostle said, 'The righteousness of God has been manifested,' and then introduced something else into the discourse, he necessarily repeats this word.
"He shows that those who benefit from this righteousness do so by faith in the Master Christ, whether those wishing to obtain it are Jews or Greeks."
"In all and upon all." Our commentators, following Theodoret, understand this as follows: "By saying 'in all,' he means the Jews, and by saying 'upon all,' those from the other nations who believed."
This understanding is justified by the words that follow: "for there is no distinction."
One may also understand it this way: by this repetition, the Apostle wished to establish more firmly the thought of the universality of salvation through faith in Jesus Christ.
He teaches both that this is the only way of salvation for all, and that it is open to all and offered to all. No one is excluded from it.
One may also understand it thus: "in all," eis, means within all, and "upon all," epi, means over all and above all.
The righteousness of God through faith in Jesus Christ acts and is accomplished within all, and extends upon all.
In the first phrase, those who have believed and tasted righteousness are meant. In the second, the power of Christ's divine economy is indicated.
It is sufficient for all mankind, extends through all ages, and reaches all. In the first, those who have believed are blessed.
In the second, those who have not yet believed are invited, by the indication of Christ's saving power overshadowing them.
"In all and upon all who believe." The power of Christ's divine economy extends to all, but is appropriated only by believers.
These are those who receive the preaching of the Gospel with sincere faith and fulfill what it requires.
That is, they resolve, having renounced impiety and worldly lusts, to live soberly, piously, and righteously in the world.
In the words "through faith in Jesus Christ," the divine economy of salvation accomplished by Jesus Christ is indicated.
In the words "in all and upon all who believe," its appropriation by faith is indicated. It shows that one can become a participant in the blessings of this divine economy only through living faith.
"For there is no distinction." Only one thing is required: believe sincerely.
All other distinctions by which men and nations differ from one another have no significance in this matter, neither for nor against. They give no right and take none away.
Sincere faith smooths away all differences and equally opens to all the entrance into the court of God's righteousness.
By setting down this word, the Apostle humbles the Jews and encourages the Gentiles. To the former he says, as it were: you have no reason to exalt yourselves. To the latter: you have no reason to despair.
No one has a right, but no one is rejected by lack of right. Whoever comes is clothed in righteousness for no other reason than faith.
When there is no faith, whoever you may be, you will receive nothing. When there is faith, whoever you may be, you will be deprived of nothing.
Bring faith, and you will buy the garment of righteousness. You will be clothed in it and be brightly glorified in it, however low your former state may have been.