""Principles of the Interior or Hidden Life"" by Thomas C. Upham is a book that focuses on the spiritual journey of those seeking assurance of faith and perfect love. The author explores the hidden life within us, which he believes is the key to unlocking our spiritual potential. Upham delves into the principles of the interior life, discussing topics such as the nature of God, the human soul, and the role of faith in our lives. He also examines the idea of perfect love, which he sees as the ultimate goal of the spiritual journey. Throughout the book, Upham offers practical advice and insights for those seeking to deepen their faith and develop a closer relationship with God. This book is a valuable resource for anyone interested in exploring the spiritual aspects of life and seeking a deeper understanding of their own faith.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.