Complex sentence: Christian engagement with public affairs has been a constant theme throughout his ministry, and for six years was Director of the Shaftesbury Project on Christian Involvement in Society, before becoming Secretary of the Church of England's Board for Social Responsibility.
Split into simpler sentences: Christian engagement with public affairs has been a constant theme throughout his ministry. For six years he was Director of the Shaftesbury Project on Christian Involvement in Society, before becoming Secretary of the Church of England's Board for Social Responsibility.