Paul’s letter to the churches in Galatia seems to burst on the reader like a sudden storm. The issues it raises still generate controversy, even after two thousand years of church history. In large measure this is because what was at stake when Paul wrote was the Gospel itself. The question of whether human works were to play any part in the justification of sinners had to be answered clearly if the fledgling Christian movement was to prosper. And Paul was determined to answer it with total clarity. This explains the vigour and energy of his language, and the impact the latter has had down the centuries.