Wherefore ( διο ). See 1:24,26 for this relative conjunction, "because of which thing."

Without excuse ( αναπολογητος ). See on 1:21.

Whosoever thou art that judgest ( πας ο κρινων ). Literally, "every one that judgest," vocative case in apposition with  ανθρωπε. Paul begins his discussion of the failure of the Jew to attain to the God-kind of righteousness (2:1-3:20) with a general statement applicable to all as he did (1:18) in the discussion of the failure of the Gentiles (Lightfoot). The Gentile is readily condemned by the Jew when he sins and equally so is the Jew condemned by the Gentile in like case.  Κρινω does not of itself mean to condemn, but to pick out, separate, approve, determine, pronounce judgment, condemn (if proper).

Another ( τον ετερον ). Literally, "the other man." The notion of two in the word, one criticizing the other.

Thou condemnest thyself ( σεαυτον κατακρινεις ). Note  κατα here with  κρινω, to make plain the adverse judgment.

For ( γαρ ). Explanatory reason for the preceding statement. The critic

practises ( πρασσεις, not single acts  ποιεω, but the habit  πρασσω ) the same things that he condemns.

Judgment ( κριμα ). Decision rendered whether good or bad.

According to ( κατα with accusative). As the rule of measure. Cf. Joh 7:24.

And doest the same ( κα ποιων αυτα ). "And doest them occasionally."

That thou shalt escape ( συ εκφευξη ). Emphasis on  συ, "thou conceited Jew expecting to escape God's  κριμα because thou art a Jew." Cf. Mt 3:8f. Paul justifies the bitter words of the Baptist to the Pharisees and Sadducees. The future middle of the old verb  εκφευγω (cf. 1Th 5:3). The Jew posed as immune to the ordinary laws of ethics because a Jew. Alas, some Christians affect the same immunity.

Or despiseth thou? ( η καταφρονεισ? ). Another alternative, that of scorn of God's kindness ( χρηστοτητος, 2Co 6:6) and forbearance ( ανοχης, old word, holding back from  ανεχω, only here in N.T.) and longsuffering ( μακροθυμιας, late word for which see 2Co 6:4,6).  Καταφρονεω is old verb to think down on ( κατα, φρονεω ) as in Mt 6:24; 1Co 11:22. This upstart Jew actually thinks down on God. And then "the riches" ( του πλουτου ) of all that comes from God.

Leadeth thee to repentance ( εις μετανοιαν σε αγε ). The very kindness ( το χρηστον, the kindly quality) of God is trying to lead (conative present  αγε ) thee to a right-about face, a change of mind and attitude ( μετανοιαν ) instead of a complacent self-satisfaction and pride of race and privilege.

After thy hardness ( κατα την σκληροτητα σου ). "According to thy hardness (old word from  σκληρος, hard, stiff, only here in N.T.) will God's judgment be."

And impenitent heart ( κα αμετανοητον καρδιαν ). See  μετανοιαν just before. "Thy unreconstructed heart," "with no change in the attitude of thy heart."

Treasurest up for thyself ( θησαυριζεις σεαυτω ). See for  θησαυριζω on Mt 6:19f.; Lu 12:21; 2Co 12:14. Dative case  σεαυτω (for thyself) with a touch of irony (Vincent).

Wrath ( οργην ). For such a Jew as already stated for the Gentile (1:18). There is a revelation ( αποκαλυψεως ) of God's wrath for both in the day of wrath and righteous judgment ( δικαιοκρισιας, a late compound word, in LXX, two examples in the Oxyrhynchus papyri, only here in N.T.). See 2Th 1:5 for  δικαιας κρισεως. Paul looks to the judgment day as certain (cf. 2Co 5:10-12), the day of the Lord (2Co 1:14).

Who will render ( ος αποδωσε ). Paul quotes Pr 24:12 as in 2Ti 4:14. See also Mt 16:27; Re 22:12. The rendering will be in accord with the facts.

To them that seek ( τοις μεν--ζητουσιν ). Dative plural of the articular present active participle of  ζητεω with  μεν on the one hand.

Eternal life ( ζωην αιωνιον ). Accusative case object of  αποδωσε above.

But unto them that are factious and obey not the truth but obey unrighteousness ( τοις δε εξ εριθειας κα απειθουσιν τη αληθεια πειθομενοις δε αδικια ). The other side with  δε and the articular present participles in the dative again, only with  εξ εριθειας, there is no participle  ουσιν. But the construction changes and the substantives that follow are not the object of  αποδωσε like  ζωην αινωνιον above, but are in the nominative as if with  εσοντα (shall be) understood (anger and wrath, both  οργη and  θυμος, tribulation and anguish, again a pair  θλιψις κα στενοχωρια on which see 2Co 5:4; 12:10).

Every soul of man ( πασαν ψυχην ανθρωπου ). See 13:1 for this use of  ψυχη for the individual.

Of the Jew first and also of the Greek ( Ιουδαιου τε πρωτον κα Hελληνος ). See on 1:16. First not only in penalty as here, but in privilege also as in 2:11; 1:16.

Respect of persons ( προσωπολημψια ). Milligan (Vocabulary) considers this word (in N.T. only here, Col 3:25; Eph 6:9) and  προσωπολημπτης (Ac 10:34) and  προσωπολημπτεω (Jas 2:9) the earliest definitely known Christian words, not in LXX or non-Christian writings. See on Ac 10:34 for the formation in imitation of the Hebrew to take note of the face ( προσωπον, λαμβανω ), to judge by the face or appearance.

Have sinned ( ημαρτον ). Constative aorist active indicative, "sinned," a timeless aorist.

Without law ( ανομως ). Old adverb "contrary to law," "unjustly," but here in ignorance of the Mosaic law (or of any law). Nowhere else in N.T.

Shall also perish without law ( ανομως κα απολουντα ). Future middle indicative of  απολλυμ, to destroy. This is a very important statement. The heathen who sin are lost, because they do not keep the law which they have, not because they do not have the Mosaic law or Christianity.

Under law ( εν νομω ). In the sphere of the Mosaic law.

By the law ( δια νομου ). The Jew has to stand or fall by the Mosaic law.

Not the hearers--but the doers ( ου γαρ ο ακροαται--αλλ' ο ποιητα ). The law was read in the synagogue, but there was no actual virtue in listening. The virtue is in doing. See a like contrast by James between "hearers" and "doers" of the gospel (Jas 1:22-25).

Before God ( παρα τω θεω ). By God's side, as God looks at it.

Shall be justified ( δικαιωθησοντα ). Future passive indicative of  δικαιοω, to declare righteous, to set right. "Shall be declared righteous." Like Jas 1:22-25.

That have no law ( τα μη νομον εχοντα ). Better, "that have not the law" (the Mosaic law).

By nature ( φυσε ). Instrumental case of  φυσις, old word from  φυω, to beget. The Gentiles are without the Mosaic law, but not without some knowledge of God in conscience and when they do right "they are a law to themselves" ( εαυτοις εισιν νομος ). This is an obvious reply to the Jewish critic.

In that they ( οιτινες ). "The very ones who," qualitative relative.

Written in their hearts ( γραπτον εν ταις καρδιαις αυτων ). Verbal adjective of  γραφω, to write. When their conduct corresponds on any point with the Mosaic law they practise the unwritten law in their hearts.

Their conscience bearing witness therewith ( συνμαρτυρουσης αυτων της συνειδησεως ). On conscience ( συνειδησις ) see on 1Co 8:7; 10:25f.; 2Co 1:12. Genitive absolute here with present active participle  συνμαρτυρουσης as in 9:1. The word  συνειδησις means co-knowledge by the side of the original consciousness of the act. This second knowledge is personified as confronting the first (Sanday and Headlam). The Stoics used the word a great deal and Paul has it twenty times. It is not in the O.T., but first in this sense in Wisdom 17:10. All men have this faculty of passing judgment on their actions. It can be over-scrupulous (1Co 10:25) or "seared" by abuse (1Ti 4:12). It acts according to the light it has.

Their thoughts one with another accusing or also excusing them ( μεταξυ αλληλων των λογισμων κατηγορουντων η κα απολογουμενων ). Genitive absolute again showing the alternative action of the conscience, now accusing, now excusing. Paul does not say that a heathen's conscience always commends everything that he thinks, says, or does. In order for one to be set right with God by his own life he must always act in accord with his conscience and never have its disapproval. That, of course, is impossible else Christ died for naught (Ga 2:21). Jesus alone lived a sinless life. For one to be saved without Christ he must also live a sinless life.

According to my gospel ( κατα το ευαγγελιον μου ). What Paul preaches (1Co 15:1) and which is the true gospel

Bearest the name ( επονομαζη ). Present passive indicative in condition of first class of  επονομαζω, old word, to put a name upon ( επ ), only here in N.T. "Thou art surnamed Jew" (Lightfoot). Jew as opposed to Greek denoted nationality while Hebrew accented the idea of language.

Restest upon the law ( επαναπαυη νομω ). Late and rare double compound, in LXX and once in the Didache. In N.T. only here and Lu 10:6 which see. It means to lean upon, to refresh oneself back upon anything, here with locative case ( νομω ). It is the picture of blind and mechanical reliance on the Mosaic law.

Gloriest in God ( καυχασα εν θεω ). Koine vernacular form for  καυχα ( καυχαεσαι, καυχασα ) of  καυχαομα as in verse 23; 1Co 4:7 and  κατακαυχασα in Ro 11:18. The Jew gloried in God as a national asset and private prerogative (2Co 10:15; Ga 6:13).

Approvest the things that are excellent ( δοκιμαζεις τα διαφεροντα ). Originally, "Thou testest the things that differ," and then as a result comes the approval for the excellent things. As in Php 1:10 it is difficult to tell which stage of the process Paul has in mind.

Instructed out of the law ( κατηχουμενος εκ του νομου ). Present passive participle of  κατηχεω, a rare verb to instruct, though occurring in the papyri for legal instruction. See on Lu 1:4; 1Co 14:19. The Jew's "ethical discernment was the fruit of catechetical and synagogical instruction in the Old Testament" (Shedd).

A guide of the blind ( οδηγον τυφλων ). Accusative  οδηγον in predicate with  εινα to agree with  σεαυτον, accusative of general reference with infinitive  εινα in indirect discourse after  πεποιθας. Late word (Polybius, Plutarch) from  οδος, way, and  ηγεομα, to lead, one who leads the way.  Τυφλων is objective genitive plural. The Jews were meant by God to be guides for the Gentiles, for salvation is of the Jews (Joh 4:22).

A light ( φως ). "A light for those in darkness" ( των εν σκοτε, objective genitive again). But this intention of God about the Jews had resulted in conceited arrogance on their part.

A corrector of the foolish ( παιδευτην αφρονων ). Old word (from  παιδευω ) for instructor, in Plato, and probably so here, though corrector or chastiser in Heb 12:9 (the only N.T. instances). See Lu 23:16. Late inscriptions give it as instructor (Preisigke).  Αφρονων is a hard word for Gentiles, but it is the Jewish standpoint that Paul gives. Each termed the other "dogs."

Of babes ( νηπιων ). Novitiates or proselytes to Judaism just as in Ga 4:1. Paul used it of those not of legal age.

The form ( την μορφωσιν ). Rare word only in Theophrastus and Paul (here and 2Ti 3:5). Pallis regards it as a Stoical term for education. Lightfoot considers the  μορφωσις as "the rough-sketch, the pencilling of the  μορφη," the outline or framework, and in 2Ti 3:5 "the outline without the substance." This is Paul's picture of the Jew as he sees himself drawn with consummate skill and subtle irony.

Thou therefore that teachest another ( ο ουν διδασκων ετερον ). Paul suddenly breaks off (anacoluthon) the long sentence that began in verse 17 and starts over again with a phrase that gathers it all up in small compass (teachest) and drives it home (therefore) on the Jew (thyself).

Not to steal ( μη κλεπτειν ). Infinitive with  μη in indirect command (indirect discourse) after  κερυσσων.

Dost thou steal? ( κλεπτεισ? ). The preaching ( κερυσσων ) was fine, but the practice? A home-thrust.

Should not commit adultery ( μη μοιχευειν ). Infinitive in direct command again after  λεγων. "The Talmud charges the crime of adultery upon the three most illustrious Rabbins" (Vincent).

That abhorrest ( ο βδελυσσομενος ). Old word to make foul, to stink, to have abhorrence for. In LXX, in N.T. only here and Re 21:8. The very word used by Jesus to express their horror of idols ( ειδωλα, see on Ac 7:41; 1Co 12:2). See Mt 24:15 for "abomination."

Dost thou rob temples? ( ιεροσυλεισ? ). Old verb from  ιεροσυλος (Ac 19:37) and that from  ιερον, temple, and  συλαω, to rob. The town clerk (Ac 19:37) said that these Jews (Paul and his companions) were "not robbers of temples," proof that the charge was sometimes made against Jews, though expressly forbidden the Jews (Josephus, Ant. IV. 8, 10). Paul refers to the crime of robbing idol temples in spite of the defilement of contact with idolatry.

Through thy transgression of the law ( δια της παραβασεως του νομου ). Old word for stepping across a line. Trench calls attention to "the mournfully numerous group of words" for the varieties of sin like  αγνοημα, ignorance,  ανομια, violation of law,  αμαρτια, missing the mark,  εττημα, falling short,  παραβασις, passing over the line,  παρακοη, disobedience to a voice,  παρανομια, putting the law aside,  παραπτωμα, falling down,  πλημμελεια, discord.

Because of you ( δι' υμας ). Free quotation from the LXX of Isa 52:5. The Jews were jealous for the Name of God and would not pronounce the Tetragrammaton and yet acted so that the Gentiles blasphemed that Name.

If thou be a doer of the law ( εαν νομον πρασσεις ). Condition of third class and the present (continued action) subjunctive of  πρασσω, a verb meaning to do as a habit.

Is become uncircumcision ( ακροβυστια γεγονεν ). The Jew is then like the Gentile, with no privilege at all. Circumcision was simply the seal of the covenant relation of Israel with God.

Keep ( φυλασση ). Present subjunctive with  εαν, condition of third class, mere supposition like that in verse 25, "keep on keeping" perfectly, Paul means.

For ( εις ). As often in N.T.

If it fulfill the law ( τον νομον τελουσα ). Present active participle (conditional use of the participle) of  τελεω, to finish, continually fulfilling to the end (as would be necessary).

Judge thee ( κρινει--σε ). Unusual position of  σε (thee) so far from the verb  κρινε.

With the letter and circumcision ( δια γραμματος κα περιτομης ).  Δια means here accompanied by, with the advantage of.

Which is one outwardly ( ο εν τω φανερω ).  Ιουδαιος (Jew) has to be repeated (ellipse) with the article, "the in the open Jew" (circumcision, phylacteries, tithes, etc.). Likewise repeat  περιτομη (circumcision).

Who is one inwardly ( ο εν τω κρυπτω ). Repeat  Ιουδαιος (Jew) here also, "the in the inward part Jew" (circumcision of the heart  περιτομη καρδιας and not a mere surgical operation as in Col 2:11, in the spirit  εν πνευματ, with which compare 2Co 3:3,6). This inward or inside Jew who lives up to his covenant relation with God is the high standard that Paul puts before the merely professional Jew described above.

Whose praise ( ου ο επαινος ). The antecedent of the relative  ου is  Ιουδαιος (Jew). Probably (Gifford) a reference to the etymology of Judah (praise) as seen in Ga 49:8.