12 so that even napkins or aprons were brought from his body [and put] upon the sick, and the diseases left them, and the wicked spirits went out.

Matthew Henry's Commentary on Acts 19:12

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.