Eusebius of Caesarea wrote, in "On the Theology of the Church", that the Nicene Creed is a full expression of Christian theology, which begins with: "We believe in One God..." Eusebius goes on to explain how initially the goal was not to expel Arius and his supporters, but to find a Creed on which all of them could agree and unite. The Arians, led by Arius and Eusebius of Nicomedia, insisted that the Son was "heteroousios" or "of a different substance/nature" from the Father. The opposition, led by Alexander, his protege Athanasius, and Hosius of Cordoba insisted that the Arian view was heretical and unacceptable. Eusebius of Caesarea suggested a compromise wording of a creed, in which the Son would be affirmed as "homoiousios", or "of similar substance/nature" with the Father. But Alexander and Athanasius saw that this compromise would allow the Arians to continue to teach their heresy, but stay technically within orthodoxy, and therefore rejected that wording. Hosius of Cordova suggested the term ""homoousios"" or "of the same substance/nature" with the Father. This term was found to be acceptable, though it meant the exclusion of the Arians. But it united most of those in attendance at Nicaea I. Even the "semi-Arians" such as Eusebius of Caesarea accepted the term and signed the Nicene Creed.