Obadiah Sedgwick (c.1600–1658) was a Presbyterian pastor and member of the Westminster Assembly. Originally published in 1641, this classic treatise has been carefully prepared to benefit a new generation of Christian readers. Archaic language has been gently modernized, and helpful footnotes have been added to aid the reader. Hundreds of Scripture references are embedded in the text (using the English Standard Version®). This edition includes a foreword by Dr. Don Kistler, a biographical preface, and review questions designed to facilitate group discussion or personal reflection.