It is most important for the practice of the Christian ministry, especially in its missionary activities toward those both within and without the Christian culture, to consider pagans, humanists, and Jews as members of the latent Spiritual Community and not as complete strangers who are invited into the Spiritual Community from outside. This insight serves as a powerful weapon against ecclesiastical and hierarchical arrogance.
Paul Tillich, Systematic Theology 3: Life & the Spirit: History & the Kingdom of God
ecumenism, religion-and-philoshophy, theology