"The Theology of Holiness" by Dougan Clark is a theological work written in the late 19th century that explores the concept of entire sanctification from a Christian perspective. The book aims to elucidate the necessity, attainability, and implications of achieving holiness in one’s spiritual journey, based on Biblically revealed truths. The beginning of the text presents an introduction to the author’s main premise that entire sanctification is essential for both salvation and the Christian life. Clark emphasizes the often-dismissed necessity of holiness, noting the indifference and even disdain some Christians show toward this vital aspect of faith. He lays a foundation for discussing the doctrine by addressing various attitudes towards holiness and asserting that it must not only be desired but actively sought and obtained in this life, rather than deferred until death. The opening reflects Clark's passionate call to believers to pursue a profound spiritual transformation and a fuller experience of divine grace. (This is an automatically generated summary.)