Romans 3:22

Even the righteousness of God, which is by faith of Jesus
Christ
A further account is given of this righteousness: why it is called "the righteousness of God", and in what sense revealed and manifested, (See Gill on Romans 1:17); Here it is said to be "by faith of Jesus Christ"; not by that faith which Christ himself had as man, but by that faith, of which he the author and object: the Alexandrian copy reads, "by faith in Jesus Christ"; and not by that as the cause of justification; for faith is neither the efficient, nor the moving, nor meritorious cause of it; no, nor the instrumental cause of it on the part of God or Christ: nor is faith the matter of a justifying righteousness; for faith is a part of sanctification, is itself imperfect, is a man's own, as it is implanted in him, and exercised by him; is here and elsewhere distinguished from righteousness; something else, and not that, as the obedience and blood of Christ, are said to be what men are made righteous and justified by: but faith is a means of apprehending and receiving righteousness; it views the excellency of Christ's righteousness; it owns the sufficiency of it; the soul by it renounces its own righteousness, submits to Christ's, rejoices in it, and gives him the glory of it: now this is by, or through faith,

unto all, and upon all:
not all men, for all have not faith, nor are all justified and saved: but

all that believe;
which must be understood, not of believing any thing, nor of any sort of believing; but of such, who truly and with the heart believe in Christ for salvation; and who are here opposed to the wise philosophers among the Gentiles, had to all self-righteous persons among the Jews. Though this character does not design any cause or condition of justification, but is only descriptive of the persons, who are declaratively interested in a justifying righteousness, which is said to be "unto", and "upon them"; that is, it is appointed, provided, and wrought out for them, and directed and applied unto them, and put upon them as a garment, and that upon all of them:

for there is no difference;
of nation, age, or sex, or of state and condition; no respect is had to persons or works; nor is there any difference with respect to weak or strong believers; the righteousness is equally applied to one as to another, and one is as much justified by it in the sight of God as another.