The Western Church commonly uses a version of the Nicene creed which has the Latin word filioque ("and the Son") added after the declaration that the Holy Spirit proceeds from the Father. Scripture reveals that the Spirit proceeds from the Father and the Son. The external relationships of the persons of the Trinity mirror their internal relationships. Just as the Father externally sent the Son into the world in time, the Son internally proceeds from the Father in the Trinity.
~ Maximus, martyr, saint, about A.D. 250, in answer to the demand of the civil authorities for sacrifice to the pagan gods; a test in common use as belief in a single Godhead was known to be definitive in the early Christian community; thus any Christian might be called on to seal with his blood his faith in the One God. (See: The Blessed Trinity)