Christian unity is the result of a shared faith in Christ and His gospel. This is what emerges from Dr Lloyd- Jones' consideration of John 17 and Ephesians 4 in the addresses to the Westminster Fellowship republished here. His presentation was given against the background of the ferment of discussion and debate engendered by the ecumenical movement of the time and demonstrated that unity is never something arrived at by ignoring or minimizing truth. The debates have moved on, but this lucid examination of the issues underlying Christian unity remains as relevant as when first presented in 1962. It points to timeless truths which should never be obscured.