Abstract
The chapter delves into the contrasting approaches of Nursi and Solzhenitsyn regarding spirituality during their time in prison. It aims to explore their personal, intellectual, and spiritual transformations, examining their quests for expansion of heart (bast), inner peace and spiritual growth. Additionally, it analyzes how their experiences in prison influenced their literary works. Incarceration provided them with an opportunity for introspection, allowing them to diagnose prevalent societal issues such as atheism, materialism, and lack of spirituality. They sought to address these issues both within their immediate circles and for the broader public. By comparing and contrasting their perspectives, as framed by Francis J. Clooney, S.J.'s comparative theological approach, we can better understand their profound efforts to improve the lives of others. Despite similarities in their reflections on faith and humanity, Nursi's spirituality centred on Islamic teachings, while Solzhenitsyn's focused on ethical and existential considerations within atheist and authoritarian contexts. Their deep understanding of this mission enabled them to endure the hardships of prison and transform adversity into meaningful endeavours.