St. John Chrysostom comments on Paul’s all-night sermon:
“Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight.” (Acts 20:7)
See how everything was subordinate to the preaching. . . . Not even during night-time was he silent, nay he discoursed the rather then, because of stillness. Mark how he both made a long discourse, and beyond the time of supper itself. . . . and talked a long while, even till break of day . . . But observe, I pray you, the theatre, how crowded it was: . . . Such was their eagerness to hear him!
Let us take shame to ourselves! “Aye, but a Paul” say you, “was discoursing then.” Yes, and Paul discourses now, or rather not Paul, either then or now, but Christ, and yet none cares to hear. No window in the case now, no importunity of hunger, or sleep, and yet we do not care to hear: no crowding in a narrow space here, nor any other such comfort. . . . But observe, I beseech you, so fervent was their zeal, that they even assembled in a third loft: for they had not a church yet.
~ St. John Chrysostom, Homily XLIII on Acts