Filioque—”and the Son” in Latin—is a phrase later added ... “there was a time when [Jesus] was not.” In response to this heresy, the Church clarified at Nicaea: And whosoever shall say that there was ...

The heresy the Nicene Creed stood against was Arianism ... The Christian West (later the Roman Catholic Church) added the Latin phrase Filioque— "and the Son"—to the above lines.