A comprehensive reevaluation of Isaac Barrow (1630-1677), one of the more prominent and intriguing of all seventeenth-century men of science. Barrow is remembered today—if at all—only as Sir Isaac Newton's mentor and patron, but he in fact made important contributions to the disciplines of optics and geometry. Moreover, he was a prolific and influential preacher as well as a renowned classical scholar. By seeking to understand Barrow's mathematical work, primarily within the confines of the pre-Newtonian scientific framework, the book offers a substantial rethinking of his scientific acumen. In addition to providing a biographical study of Barrow, it explores the intimate connections among his scientific, philological, and religious worldviews in an attempt to convey the complexity of the seventeenth-century culture that gave rise to Isaac Barrow, a breed of polymath that would become increasingly rare with the advent of modern science.