In the realm of social philosophy, intersubjectivity plays a vital role in understanding the relationship between the self and others. The concept of intersubjectivity, which refers to shared experiences and understandings between individuals, is not only the basis for social interaction but also essential for building strong bonds in relationships among individuals within a group. In recent times, relationships within groups have shown their weaknesses because individuals tend to focus primarily on themselves. In group processes, the tendency toward individuation—where individuals prioritize their own intentions and self-interest—can lead to the breakdown of interpersonal relationships in the pursuit of shared goals, thereby weakening overall group cohesion.  As a result of excessive individuation, group members may become less engaged in the goal-achieving process, inhibiting the sense of togetherness that is essential for the group’s pursuit of shared objectives. This research explores the concept of intersubjectivity based on the core ideas of Gabriel Marcel, influenced by two important philosophers of intersubjectivity: Edmund Husserl and Martin Buber. Marcel offers a unique perspective on how intersubjectivity forms a holistic existential understanding of the shared world, with implications for strengthening relationships among individuals within a group. The purpose of this article is to explore the concept of intersubjectivity and its role in understanding the relationships between individuals within a religious group. It demonstrates how intersubjectivity strengthens interpersonal relationships, fosters shared experiences, and overcomes weaknesses in group dynamics caused by individual selfishness. Ultimately, it aims to highlight the importance of intersubjectivity in building stronger and more meaningful relationships within religious groups and in the broader context of social interaction.