Galatians 4:22

Ishmael was the son of the slave woman, Hagar. She was Sarah's servant (see Genesis 16:15). Sarah gave Hagar to Abraham, trying to get the heir God promised through human efforts (see Genesis 16:1–4). Isaac, Sarah's son, was born to the free woman (see Genesis 21:2–3). God did something miraculous to help Sarah have this baby. This fulfilled God's promise (see Genesis 17:15–21).

• Paul now returns to using Scripture to support his argument. He tells the story of two of Abraham's wives, Hagar and Sarah, and their children. He uses this story to show the difference between two types of people: those who are like slaves because they try to follow all the laws, and those who are free because they belong to Christ.

• Paul uses a special way of explaining Bible stories (called allegory) that Jewish teachers used in those days (see study note on 4:24). Paul was trained as a rabbi (see Acts 22:3) and could effectively debate the Judaizers using their own methods.