Assurance (theology)

In Christian theology, assurance refers to a believer's confidence in God, in God's response to prayer, and in the hope of eternal salvation. In Protestant Christian doctrine, the term "assurance", also known as the Witness of the Spirit, affirms that the inner witness of the Holy Spirit allows the Christian disciple to know that they are justified. Based on the writings of St. Augustine of Hippo, assurance was historically an important doctrine in Lutheranism and Reformed Christianity, and remains a distinguishing doctrine of Methodism, although there are differences among these Christian traditions. Hymns that celebrate the witness of the Holy Spirit, such as Fanny Crosby's "Blessed Assurance", are sung in Christian liturgies to celebrate the belief in assurance.