It is not possible for the Lord to agonize over the unity of His disciples and for us to remain indifferent about the unity of all Christians. This would constitute criminal betrayal and transgression of His divine commandment.

Patriarch Bartholomew I of Constantinople
Patriarchal and Synodal Encyclical on the Sunday of Orthodoxy, 21 Feb 2010

(and for your viewing edification, 60 Minutes interview with the Patriarch a couple months ago)