The Duty and Liberty of a Christian Church: Asserted Against Popery, Puseyism, and Erastianism is a book written by Andrew Gray and published in 1843. The book discusses the role of the Christian church in society and its relationship with the state. Gray argues that the church has a duty to assert its independence from the state and to maintain its own authority in matters of faith and morals. He also critiques the influence of Roman Catholicism,...