This is an encyclical letter of the Synod of Bishops of the Orthodox Church in America on the topic of Christian unity and Ecumenism. The sections of the encyclical include “The Unity of the Church,” “The Ecumenical Movement Today,” “The Danger of Relativism,” “The Danger of Secularism,” “Orthodox Participation in the Ecumenical Movement,” and “Areas of Ecumenical Cooperation.”