Professed Christians—a scathing critique of comfortable Christianity that became a bestseller. All this in spite of the fact that poor health plagued him his entire life, sometimes keeping him bedridden for weeks. During one such time in his late twenties, he wrote, “[I] am still a close prisoner, wholly unequal even to such a little business as I am now engaged in: add to which my eyes are so bad that I can scarce see how to direct my pen.” He survived this and other bouts of debilitating illness