Visionary Physics is one of the most influential and truly revolutionary books in Blake criticism and was celebrated as such by Northrop Frye and other major Blake scholars. Throughout his work, William Blake attacked Sir Isaac Newton for the limitations in the latter's view of reality. In this book, Donald Ault demonstrates that Blake did not simply reject he studied him deeply. Blake's attitude toward the physicist involved the whole of the poet's imaginative activity. The new edition includes two additional essays by the author, and is the first corrected and expanded version in a quarter of a century.