This article takes Chong Sheng Yuan Gospel Drug Rehabilitation Center in Baoshan, Yunnan, as a case study. It is based on the long-term follow-up of three individual cases, mainly through the analysis of the concepts of regret and trust. Specifically, to elaborate the existential significance of religious practices in two stages, and the internal consistency between these two stages, which can be classified into three modes: aesthetic, ethical and recollective. In the individual cases analysis, this paper further points out that if an affective structure was actually constructed, regret and trust will always affect one's religious practices as a whole. This shows that the existential significance of Christian faith cannot simply be equated to a static and general idealized form, but needs to be constantly presented and understood in the tense and specific existential situation of subjectivity.