Present social and personal spiritual crises make it necessary to actualize the significance of a personal return to God. The Church invites to evaluate again the importance of religious conversion in preventing various social and personal spiritual pathologies. In this context, discussion and specification of a multidimensional phenomenon of religious conversion is problematic. Following the objectives of the Church to deepen the faith and renew evangelisation, this research aims to answer the following scientific questions: what are the typical features of a religious conversion? What are the factors that can influence the dynamics of this process? What are the changes a personal religious conversion may inspire? This article presents a theoretical analysis of a phenomenon of conversion. The research has shown that personal transformation and existential fulfillment of one’s personal life is an essential meaning of a religious conversion. Religion performs a positive psychotherapeutic function, it gives a meaning to a human existence and contributes to a personal maturity, also leads to a wholesome relationship with God where the meaning of human existence is completely fulfilled. Religious conversion may be considered as one of the fundamental elements of a spiritual health within the context of the present life challenges.