"The heart of the parliamentarian ideology was the connection in men's minds between the struggle against popery and the preservation of true religion... We can only understand the zeal of the parliamentarians at the start of the war if we appreciate the frustration many of them felt at the bizarre appearance of a Church half reformed, the inspiration afforded by the vision of a new Jerusalem and the shock created by the king's assault in the previous decade on the mainstream of moderate Puritan evangelicalism... What was really at stake at the deepest level of this crisis was not the issue of the militia or appointment of councillors, the immediate expressions of political distrust, but the future of the Church."