Macedonius and his followers were [[Semi-Arianism|semi-Arian]], and taught that though the [[Christ|Son]] was eternal, He was not of one essense essence (Latin: consubstanciales, Greek: homoousios) with the [[God the Father|Father]] but of like essense essence (Greek: homoiousios) with the Father. They also taught that the [[Holy Spirit]] was not eternal and consubstantial with the Father and the Son but a creation of the Father and an action of the Son. Thus, the Macedonians denied that the Holy Spirit was a [[hypostasis]], or person, of the [[Holy Trinity]].