Acts 21:40 - Ellicott's Commentary On The Whole Bible

Paul stood on the stairs. — The position was one which raised him above the people, and the characteristic gesture commanded instant attention. And he spoke, not as they expected in the Greek, which belonged to one who fraternised with Gentiles, but in the Hebrew or Aramaic, which he had studied at the feet of Gamaliel. It was a strange scene for that Feast of Pentecost. The face and form of the speaker may have been seen from time to time by some during his passing visits to Jerusalem, but there must have been many who had not heard him take any part in public action since the day when, twenty-five years before, he had kept the garments of those who were stoning Stephen. And now he was there, accused of the self-same crimes, making his defence before a crowd as wild and frenzied as that of which he had then been the leader.