1. Galatians 2:4 (ESV)
  2. Exposition

What is the matter that Paul is referring to?

Galatians 2:4 (ESV)

4 Yet because of false brothers secretly brought in who slipped in to spy out our freedom that we have in Christ Jesus, so that they might bring us into slavery

The matter in question is the matter of circumcision. The false brothers wanted Titus to be circumcised. They do not understand justification by faith apart from works and think that certain works (for example, circumcision) are necessary for salvation (Acts 15:1).1