Werge, Thomas. Thomas Shepard. Boston: Twayne, 1987. In the theology of Jonathan Edwards, the signs or marks of grace consist of the inward and outward evidences of a person’s conversion by the Holy Spirit unto salvation. Edwards uses the term “grace” in many ways throughout his writings, but his references to “marks” or “signs” of grace primarily refer to effectual saving grace. A distinction is made between common grace, which is extended to all humanity, and special covenantal