5.

 In what sense is the Orthodox idea of the Church “certainly spiritual and mystical”?

            The Orthodox idea of the Church is spiritual and mystical in the sense that Orthodox theology never deals with the earthly aspect of the Church in isolation from God. The Church is always thought of as the Church of Christ and the Holy Spirit, and in terms of the special relationship existing between the Church and God. The Orthodox doctrine of the Church is Trinitarian (it sees the Church as an icon of the Holy Trinity); it is Christological (for the Church is the Body of Christ); and it is Pneumatological (inasmuch as the Church is a continued Pentecost and is a temple and dwelling-place of the Holy Spirit.