Holy Trinity
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The term Trinity dates back at least to the time of Tertullian. It combines the concepts of tri- (three) and unity (one), and refers to the three Persons of God who are consubstantial (i.e. of one essence or homoousios) and coeternal with each other. There never was a time when any of the Persons of the Trinity did not exist, for God is beyond and before time--though He acts within time, both moving and speaking within history thereby revealing Himself.
