I am only about half alive—a large part of my strength is consumed in sitting up or walking. My nervous system is a shattered wreck, and I am absolutely bored & listless save when I come upon something which peculiarly interests me. However—so many things do interest me, & interest me intensely, in science, history, philosophy, & literature; that I have never actually desired to die, or entertained any suicidal designs, as might be expected of one with so little kinship to the ordinary features of life.
Letter to Alfred Galpin (27 May 1918), published in Letters to Alfred Galpin edited by S. T. Joshi, p. 18