Inspiration was the concept by which theologians explained how books of the Bible were written. The most famous is Wordsworth's remark in the Preface to Lyrical Ballads that ‘all good poetry is the spontaneous overflow of powerful feelings’, which converts it into psychological process. The Romantics believed the urge to write was preceded by involuntary, unpremeditated processes. Admittedly, that was as nothing compared with Wordsworth's revisions of The Prelude, which extended across five decades and resulted in multiple versions of the same work, none published during the author's lifetime. If revision was important to Byron, Wordsworth, and Coleridge, it was no less so to Shelley, as his manuscripts reveal. Indeed, the Bodleian Shelley manuscripts, which display him at work on such poems as ‘Mont Blanc’, indicate that composition for him was a painstaking process in which every line was drafted and redrafted.