""Principles of the Interior or Hidden Life"" is a book written by Thomas C. Upham. It is designed to help those who are seeking assurance of faith and perfect love by exploring the principles of the interior or hidden life. The book delves into the deeper aspects of spirituality and offers insights into how to cultivate a more meaningful spiritual life. Upham's writing is clear and concise, making it easy for readers to understand and apply the principles he presents. This book is ideal for anyone looking to deepen their spiritual practice and gain a greater understanding of the inner workings of faith and love.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.