“For the Orthodox, spirituality is about moving more and more closely into communion with the source of life, with God, who has been revealed as Father, Son, and Holy Spirit. It is the life of that relationship, which can be lived fully only in the context of the Church. The Holy Spirit was given to the Church as a whole, not to a set of individuals, and it is when the Church gathers that the fullness of Christ’s presence among us can be realized. The self becomes what it truly is only in relationship; this teaching is at the heart of Orthodox trinitarian theology.
However, here it is necessary to say something about the mysterious nature of what ‘membership’ means, when we speak of someone as a ‘member’ of the Church. Membership in a merely social sense is hardly the point. To live truly as an Orthodox means prayer, ascetic struggle, spiritual direction, and liturgical participation. And the participation must involve the whole of self: before we recite the Creed we say, ‘Let us love one another so that with one mind we may confess Father, Son and Holy Spirit…’ Without love and reconciliation, the rest is meaningless.” (John Garvey, Orthodoxy for the Non-Orthodox, pp. 76-77)