Introduction
1. Plan and Purpose. (1) Acts represents the exact religious standpoint of St. Paul. Its theme, the expansion of Christianity from a Jewish sect into a world-wide religion, is in fact St. Paul's own ideal, in pursuit of which he broke every hindering tie, and strained every faculty of mind and body for upwards of thirty years. The keynote of the book is struck at once in Acts 1:8, 'Ye shall be witnesses unto Me both in Jerusalem and in Samaria, and unto the uttermost part of the earth.' These words, uttered by the risen Lord, fell at the time upon dull and inattentive ears. At first the Twelve realised only their mission to the house of Israel. It required a special revelation to procure the baptism of the Ethiopian eunuch, and a thrice-repeated vision to induce the reluctant Peter to baptise Cornelius. Even when these important steps had been taken, the Twelve showed such hesitation to undertake aggressive work among the Gentiles, that the Lord of the Church raised up a thirteenth apostle to champion Gentile rights, and to inaugurate a more liberal policy. This 'chosen vessel,' converted by a special miracle, and endowed with an authority independent of the Twelve, broke through the old prejudices which still hampered the original disciples, founded flourishing Gentile Churches, in which the Law was no longer observed, in the most important eastern provinces of the Empire, and, at the date when the book closes (about 61 a.d.), was proclaiming the gospel in the great western capital itself.
The book is thus a defence of Gentile Christianity, and of its great originator and advocate, St. Paul, of whom the author was a companion and enthusiastic admirer. What Boswell was to Johnson, that this unnamed writer was to St. Paul. Just as Johnson owes the affectionate regard of posterity in no small measure to the labours of his faithful and admiring biographer Boswell, so St. Paul owes his place of esteem in the minds of subsequent generations as the ideal Christian hero and missionary very largely to the author of Acts. The Pauline Epistles may teach us more of the Apostle's inner life, but it is Acts which gives us those outward facts which make him live before us as an actual character on the scene of history.
(2) But the writer of Acts has still a further purpose. He recognises in a manner quite remarkable for so thoroughgoing a supporter of St. Paul, the immense value and importance of the work of St. Peter and the earlier Apostles. It is probable that when he wrote (about 61 a.d.), there still lingered in Gentile Churches some suspicion of the opinions and methods of the Twelve, and in the Judaic Churches of Palestine some dislike and distrust of the Apostle of the Gentiles. This the writer deliberately determined to remove. He therefore divided his book into two distinct sections, Acts 1-12, in which the chief hero is St. Peter, and Acts 13-28 in which the chief hero is St. Paul. He intended his Gentile readers by a perusal of Acts 1-12 to be brought to understand and to admire St. Peter, and his Jewish Christian readers by a perusal of the rest of the book to be brought to understand St. Paul. True to his purpose of acting as a peacemaker, he places both his heroes in the most attractive possible light, passes lightly over the past differences and misunderstandings (e.g. he omits the serious dispute between Peter and Paul at Antioch, Galatians 2:11., altogether), and dwells far more upon the points of agreement than upon the points of difference between two great Christian parties.
(3) There are reasons for thinking that the author intended his work to be also a kind of apology for Christianity addressed to the heathen world. Without going to the length of supposing, as some do, that it was intended to be produced and read at St. Paul's trial as a formal vindication of the Apostle and his religion against the misrepresentations of his accusers, we may still discern in almost every chapter a desire to influence favourably Gentile readers, especially those belonging to the cultured and official classes. The author is well equipped for his task. He writes as an educated man to educated men. He opens his book with a short preface and dedication in the approved classical manner. He writes in a style which, if not the purest Attic Greek, is still graceful, easy, refined, and forcible. It is not only superior to any other Greek in the NT., but it compares favourably with that of many of the best profane authors of the age, and is far superior to the Greek of the early patristic writers, such as St. Clement of Rome, the author of the so-called Second Epistle of Clement, the author of the Epistle to Diognetus, and even to that of such professional scholars as Aristides and St. Justin Martyr. An educated pagan, happening to peruse Acts, could not fail to. recognise that some at least of the despised Galileans were persons of culture and refinement. Our author is in close sympathy with the best side of heathen life and religion, recognising that even the worshippers of the false gods of pagan Greece and Rome were feeling after the true God if haply they might find Him, and that He had not left Himself entirely without witness even in the gross darkness of degrading superstition (Acts 14:15; Acts 17:27 cp. Romans 1:20). He attempts to conciliate the official and power-holding classes, in whose hands was the actual administration of the Empire, by representing St. Paul as a peaceable and law-abiding subject, proud of his Roman citizenship, and, so far from cherishing disloyal designs against the Imperial Government, continually and successfully appealing to its aid against the hostile machinations of the turbulent Jews (Acts 18:14; Acts 19:31; Acts 21:32; Acts 22:29; Acts 23:29; Acts 24:26; Acts 25:16; Acts 25:25; Acts 26:32; Acts 27:3; Acts 27:43; Acts 28:7; Acts 28:10; Acts 28:7; Acts 28:10; Acts 28:16; Acts 28:30).