8 He entered into the synagogue, and spoke boldly for a period of three months, reasoning and persuading about the things concerning the Kingdom of God. 9 But when some were hardened and disobedient, speaking evil of the Way before the multitude, he departed from them, and separated the disciples, reasoning daily in the school of Tyrannus. 10 This continued for two years, so that all those who lived in Asia heard the word of the Lord Jesus, both Jews and Greeks. 11 God worked special miracles by the hands of Paul, 12 so that even handkerchiefs or aprons were carried away from his body to the sick, and the evil spirits went out.
Matthew Henry's Commentary on Acts 19:8-12
Commentary on Acts 19:8-12
(Read Acts 19:8-12)
When arguments and persuasions only harden men in unbelief and blasphemy, we must separate ourselves and others from such unholy company. God was pleased to confirm the teaching of these holy men of old, that if their hearers believed them not, they might believe the works.