Cleansing leads to honorable usefulness
Paul draws a conclusion from the image: if someone “purges himself from these,” that person becomes an honorable vessel. The result is described in three linked ways: set apart, suitable for the master’s use, and prepared for every good work. The focus is practical readiness—being clean and available for the household owner’s purposes.
Unit 3 (vv. 20–21 together): From mixed reality to personal outcome
Taken together, the passage moves from the mixed contents of a household to the personal pathway toward usefulness. The “therefore” signals that the household picture is not just descriptive; it is meant to motivate a response. The final aim is not status for its own sake but readiness for “every good work” within the master’s agenda.