For nearly 2,000 years, Christian mystics, martyrs, and sages have documented their search for the divine. Their writings have bestowed boundless wisdom upon subsequent generations. But they have also burdened many spiritual seekers. The sheer volume of available material creates a seemingly insurmountable obstacle. Enter the Upper Room Spiritual Classics series, a collection of authoritative texts on Christian spirituality curated for the everyday reader. Designed to introduce 15 spiritual giants and the range of their works, these volumes are a first-rate resource for beginner and expert alike. Writings of Thomas Kelly presents inspiring essays from this 20th-century Quaker whom Richard Foster called "a giant soul." This volume includes excerpts from Kelly's beloved Testament of Devotion, along with letters and other writings, some of which have not been widely available until now.