A Latin phrase meaning 'and the Son' that was added to the Christian Creed in medieval times, causing major disputes between Eastern and Western churches about the nature of the Holy Trinity.
From Latin 'filius' (son) and 'que' (and). The term emerged in the 6th century Spanish church and became a central theological controversy during the Great Schism of 1054 between Catholic and Orthodox Christianity.
This single phrase literally split Christianity in two for over 900 years—it's wild that three little Latin words caused the biggest religious divide in Western history, and many Orthodox and Catholic churches still disagree about whether it should be there.
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