Luke setteth forth again the increasing of the Church, to the end he may the better declare the power of God and his grace in the continual going forward thereof. This was an excellent work of God that the Church should suddenly, and, as it were, in a moment, be raised up; but this is worthy no less admiration, in that he furthereth that work which he had begun amidst so many lets, in that the number of these is increased, whom to diminish, and so, consequently, to destroy the whole stock, the world doth so greatly labor. In that he saith that the Word of God did grow, his meaning is, that it was spread further abroad. The Word of God is said to grow two manner of ways; either when new disciples are brought to obey the same, or as every one of us profiteth and goeth forward therein Luke speaketh in this place of the former sort of increasing, for he expoundeth himself by and by, when he speaketh of the number of the disciples. Notwithstanding, he restraineth this so great an increasing of faith unto one city. For although it be to be thought that the disciples were scattered abroad elsewhere, yet was there no certain body save only at Jerusalem.
And a great company. Seeing that (in speaking properly) our faith doth obey the doctrine of the gospel, it is a figurative speech, uttered by metonymia, when Luke saith. That they obeyed the faith; for the word faith is taken by him for the Word of God, and the very profession of Christianity. And he reckoneth up the priests by name, because they were for the most part enemies; for which cause it was a wonderful work of God that some should be converted, and much more wonderful that many. For at the first they raged against Christ with this brag, “Hath any of the rulers believed in him? But this multitude, which knoweth not the law, are accursed.”