18:7-11 The Lord knows those that are his, yea, and those that shall be his; for it is by his work upon them that they become his. Let us not despair concerning any place, when even in wicked Corinth Christ had much people. He will gather in his chosen flock from the places where they are scattered Thus encouraged, the apostle continued at Corinth, and a numerous and flourishing church grew up.
8. Crispus, the chief ruler of the synagogue, believed on the Lord with all his house—an event felt to be so important that the apostle deviated from his usual practice (1Co 1:14-16) and baptized him, as well as Caius (Gaius) and the household of Stephanas, with his own hand [Howson].
many of the Corinthians … believed and were baptized—The beginning of the church gathered there.