That admission does not necessarily carry with it an acceptance of all that the Book of Acts says about the Jerusalem period in Paul's life, particularly all that it says about his having been a disciple of Gamaliel. But the decisive point has been gained. If the entire account of the early Jerusalem residence of Paul is not ruled out by the testimony of his own Epistles, then there is at least no decisive objection against the testimony of Acts with regard to the details. Certainly the common opinion to the effect that Paul went to Jerusalem to receive rabbinical training is admirably in accord with everything that he says in his Epistles about his zeal for the Law. It is also in accord with his habits of thought and expression, which were transformed and glorified, rather than destroyed, by his Christian experience. The decision about every detail of course depends ultimately upon the particular conclusion which the investigator may have reached with regard to the Book of Acts. If that book was written by a companion of Paul--an opinion which is gaining ground even in circles which were formerly hostile--then there is every reason to suppose that Paul was brought up in Jerusalem at the feet of Gamaliel (Acts xxii. 3). Some important questions indeed still remain unanswered, even with full acceptance of the Lucan testimony. It can never be determined, for example, at exactly what age Paul went to Jerusalem. The words, "brought up in this city," in Acts xxii. 3 might seem to suggest that Paul went to Jerusalem in early childhood, in which case his birthplace would be of comparatively little importance in his preparation for his lifework, and all the elaborate investigations of Tarsus, so far as they are intended to shed light upon the environment of the apostle in his formative years, would become valueless. But the Greek word "brought up" or "nourished" might be used figuratively in a somewhat flexible way; it remains, therefore, perfectly possible that Paul's Jerusalem training began, not in childhood, but in early youth. At any rate, an early residence in Jerusalem is not excluded by the masterly way in which the apostle uses the Greek language. It must always be remembered that Palestine in the first century was a bilingual country;[30] the presence of hosts of Greek-speaking Jews even in Jerusalem is amply attested, for example, by the early chapters of Acts. Moreover, even after Paul's Jerusalem studies had begun, his connection with Tarsus need not have been broken off. The distance between the two cities was considerable (some four or five hundred miles), but travel in those days was safe and easy. A period of training in Jerusalem may have been followed by a long residence at Tarsus. [30] See Zahn, _Einleitung in das Neue Testament_, 3te Aufl., i, 1906, pp. 24-32, 39-47 (English Translation, _Introduction to the New Testament_, 2nd Ed., 1917, i, pp. 34-46, 57-66).