κατηχηθησαν 2727 5681 V-API-3P δε 1161 CONJ περι 4012 PREP σου 4675 P-2GS οτι 3754 CONJ αποστασιαν 646 N-ASF διδασκεις 1321 5719 V-PAI-2S απο 575 PREP μωσεως 3475 N-GSM τους 3588 T-APM κατα 2596 PREP τα 3588 T-APN εθνη 1484 N-APN παντας 3956 A-APM ιουδαιους 2453 A-APM λεγων 3004 5723 V-PAP-NSM μη 3361 PRT-N περιτεμνειν 4059 5721 V-PAN αυτους 846 P-APM τα 3588 T-APN τεκνα 5043 N-APN μηδε 3366 CONJ τοις 3588 T-DPN εθεσιν 1485 N-DPN περιπατειν 4043 5721 V-PAN
Vincent's NT Word Studies
21. They are informed (kathchqhsan). More than informed. They had been carefully instructed, probably by the Judaizing teachers. See on instructed, Luke i. 4.To forsake Moses (ajpostasian ajpo, Mwsewv). Lit., apostasy from Moses. Compare 2 Thess. ii. 3.
Robertson's NT Word Studies
21:21 {They have been informed concerning thee} (kateceqesan peri sou). First aorist passive indicative of katecew. A word in the ancient Greek, but a few examples survive in the papyri. It means to sound (echo, from ecw, our word) down (kata), to resound, re-echo, to teach orally. Oriental students today (Arabs learning the Koran) often study aloud. In the N.T. only in #Lu 1:4 which see; #Ac 18:25; 21:21; 1Co 14:19; Ga 6:6; Ro 2:18. this oral teaching about Paul was done diligently by the Judaizers who had raised trouble against Peter (#Ac 11:2) and Paul (#15:1,5). They had failed in their attacks on Paul's world campaigns. Now they try to undermine him at home. In Paul's long absence from Jerusalem, since #18:22, they have had a free hand, save what opposition James would give, and have had great success in prejudicing the Jerusalem Christians against Paul. So James, in the presence of the other elders and probably at their suggestion, feels called upon to tell Paul the actual situation. {That thou teachest all the Jews which are among the Gentiles to forsake Moses} (hoti apostasian didaskeis apo mwusews tous kata ta eqne pantas ioudaious). Two accusatives with didaskeis (verb of teaching) according to rule. Literally, "That thou art teaching all the Jews among (kata) the Gentiles (the Jews of the dispersion as in #2:9) apostasy from Moses." That is the point, the dreadful word apostasian (our apostasy), a late form (I Macc. 2:15) for the earlier apostasis (cf. #2Th 2:3 for apostasia). "In the eyes of the church at Jerusalem this was a far more serious matter than the previous question at the Conference about the status of Gentile converts" (Furneaux). Paul had brought that issue to the Jerusalem Conference because of the contention of the Judaizers. But here it is not the Judaizers, but the elders of the church with James as their spokesman on behalf of the church as a whole. They do not believe this false charge, but they wish Paul to set it straight. Paul had made his position clear in his Epistles (I Corinthians, Galatians, Romans) for all who cared to know. {Telling them not to circumcise their children} (legwn me peritemnein autous ta tekna). The participle legwn agrees with "thou" (Paul), the subject of didaskeis. this is not indirect assertion, but indirect command, hence the negative me instead of ou with the infinitive (Robertson, _Grammar_, p.1046). The point is not that Paul stated what the Jewish Christians in the dispersion do, but that he says that they (autous accusative of general reference) are not to go on circumcising (peritemnein, present active infinitive) their children. Paul taught the very opposite (#1Co 7:18) and had Timothy circumcised (#Ac 16:3) because he was half Jew and half Greek. His own practice is stated in #1Co 9:19 ("to the Jews as a Jew"). {Neither to walk after the customs} (mede tois eqesin peripatein). Locative case with infinitive peripatein. The charge was here enlarged to cover it all and to make Paul out an enemy of Jewish life and teachings. That same charge had been made against Stephen when young Saul (Paul) was the leader (#6:14): "Will change the customs (eqe the very word used here) which Moses delivered unto us." It actually seemed that some of the Jews cared more for Moses than for God (#Ac 6:11). So much for the charge of the Judaizers.