"Let none think that it belittles a minister of the gospel to engage in canvassing as a means of carrying truth to the people. In doing this work he is laboring in the same manner as did the apostle Paul, who says: “Ye know, from the first day that I came into Asia, after what manner I have been with you at all seasons, serving the Lord with all humility of mind, and with many tears, and temptations, which befell me by the lying in wait of the Jews: and how I kept back nothing that was profitable unto you, but have showed you, and have taught you publicly, and from house to house, testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ.” Acts 20:18-21 . The eloquent Paul, to whom God manifested Himself in a wonderful manner, went from house to house in all humility of mind, and with many tears and temptations. 6T 321.3"
"And when they were come to him, he said unto them, Ye know, from the first day that I came into Asia, after what manner I have been with you at all seasons, Serving the Lord with all humility of mind, and with many tears, and temptations, which befell me by the lying in wait of the Jews: And how I kept back nothing that was profitable unto you, but have shewed you, and have taught you publickly, and from house to house, Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ."
Ellen White directly references Acts 20:18-21 in this passage.