John Calvin on Acts 19:10

10. All which dwelt. Luke doth not mean that the men of Asia came thither to hear Paul; but that the smell [savor] of his preaching went throughout all Asia, and that the seed was sown far and wide; so that his labor was fruitful not only to one city, but also to places which were far off; and that cometh to pass oftentimes, that when the truth of God is preached in one place, it soundeth where the voice of the minister cannot sound, being spread abroad far and wide; because it is delivered from hand to hand, and one doth teach another. For one man were not sufficient, unless every man were for himself diligent to spread abroad the faith.