From Martin L. Smith’s “A Season for the Spirit: Readings for the Days of Lent”–

” Thomas Merton was deeply impressed by a profound and simple statement of an Orthodox bishop, Metropolitan Eulogius: ‘People like St. Seraphim, St. Francis, and many others have accomplished the unity of the churches in their own lives.’ [Merton] took this as a clue to his own vocation as a monk:

‘If I can unite IN MYSELF the thought and devotion of Eastern and Western Christendom, the Greek and the Latin Fathers, the Russian with the Spanish mystics, I can prepare in myself the reunion of divided Christians. From that secret and unspoken unity in myself can eventually come to a visible and Manifest unity of all Christians…We must contain all divided worlds in ourselves and transcend them in Christ.’

Of course I will always be a Christian in a particular tradition, with the gifts and the weaknesses that mark it. But I belong to the one, holy, catholic [universal], and apostolic church. I must delight in calling myself a catholic [universal] Christian.”