Because the Christian God is not a lonely God, but rather a communion of three persons, faith leads human beings into the divine communion. One cannot, however, have a self-enclosed communion with the Triune God- a foursome, as it were-- for the Christian God is not a private deity. Communion with this God is at once also communion with those others who have entrusted themselves in faith to the same God. Hence one and the same act of faith places a person into a new relationship both with God and with all others who stand in communion with God.
The nature of the Christian God as a community of three persons emphasizes that faith is not a solitary experience but one that connects individuals to the divine. This communion transcends personal connection; it invites believers into a relationship not just with God, but also with fellow believers who share the same faith. This interconnectedness highlights the communal aspect of faith within Christianity.
In essence, to believe in the Triune God is to join a larger family of faith. One's act of faith not only deepens their relationship with God but also creates bonds with others who have entered into this communion. Therefore, the Christian experience is inherently communal, reflecting the nature of God as a shared presence among all who believe.