Having had perfect understanding of all things from the very first; more accurately rendered, having followed up (or, investigated) step by step all things from their source. St. Luke, without depreciating the accounts of the life and work of Jesus then current in the Church, here sets out his reasons for undertaking a fresh compilation. His Gospel would differ from the early Gospels:
THE GOSPEL OF THE INFANCY. The critical reader of the Gospel in the original Greek is here startled by the abrupt change in the style of writing. The first four verses, which constitute the introduction, are written in pure classical language; the sentences are balanced, almost with a rhythmical accuracy. They are the words evidently of a highly cultured mind, well versed in Greek thought. But in the fifth verse, where the history of the eventful period really begins, all is changed. The narrative flows on clearly with a certain picturesqueness of imagery; the style is simple, easy, vivid; but at once the reader is sensible that he has passed out of the region of Greek and Western thought. The language is evidently a close translation from some Hebrew original; the imagery is exclusively Jewish, and the thoughts belong to the story of the chosen people. It is clear that this section of St. Luke's writing, which ends, however, with Luke 2:1-52, is not derived from apostolic tradition, but is the result of his own investigation into the origin of the faith of Christ, gathered probably from the lips of the virgin mother herself, or from one of the holy women belonging to her kinsfolk who had been with her from the beginning of the wondrous events. St. Luke reproduced, as faithfully as he could in a strange tongue, the revelations—some perhaps written, some no doubt oral, communicated to him, we reverently believe, by the blessed mother of Jesus herself. The story of these two chapters is what St. Luke evidently alludes to when, in his short preface (verse 3), he writes of his "perfect understanding in all things from the very first ( ἄνωθεν)."