Theological differences between the Catholic Church and the Eastern Orthodox Church
The Catholic Church and the Eastern Orthodox Church have been in a state of official schism from one another since the East–West Schism of 1054. This schism was caused by historical and language differences, and the ensuing theological differences between the Western and Eastern churches.
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The main theological differences with the Catholic Church are the papal primacy and the filioque clause. In spirituality, the tenability of neo-Palamism's essence-energy distinction and of the experiential vision of God as attained in theoria and theosis are actively debated.
Although the 21st century saw a growth of anti-western sentiments with the rise of neo-Palamism, "the future of East–West rapprochement appears to be overcoming the modern polemics of neo-scholasticism and neo-Palamism". Since the Second Vatican Council, the Catholic Church has generally taken the approach that the schism is primarily ecclesiological in nature, that the doctrinal teachings of the Eastern Orthodox churches are generally sound, and that "the vision of the full communion to be sought is that of unity in legitimate diversity" as before the division.