All truth is worth discovering, but some truths are most worth knowing. In this timely and significant book, President Boyd K. Packer shares vital, eternal truths that he has learned in ninety years of life and over fifty years as a General Authority truths that can help guide us through our own mortal journey. Chapters entitled Prayer and Promptings, How to Survive in Enemy Territory, and The Key to Spiritual Protection address issues that are essential to our faith and well-being in the perilous and turbulent times in which we live. President Packer writes of this final witness, After all the years that I have lived and taught and served, after the millions of miles I have traveled around the world, and with all that I have experienced, I wish to share with you those truths which are the most worth knowing.