My grandmother’s favorite hymn was “Trust and Obey.” As a little girl, I liked the hymn just because she did. Now that she’s gone, its beautiful simplicity and her memory endear it even more to me. Trust and obey, for there’s no other way to be happy in Jesus. Sometimes, however, that faith gets tried with fire. As a missionary wife and mother, my grandmother experienced death threats against her husband, buried her firstborn son in South America, and before her own home-going much later in life, suffered the debilitating effects of Alzheimer’s. Trust and obey? Last week, author and teacher Dr. Dennis E. Hensley or “Doc Hensley” served as keynote…