Now, if we may take Hilary’s explanation, it is obvious that when, half a century afterwards, Arius denied the Son to be of the Divine ousia or substance, the situation was exactly reversed. Homoousion directly contradicted the heretic. In the conflicts which ensued, the extreme Arians persisted in the Heteroousion Symbol. But the Semi-Arians were more moderate, and consequently more plausible, in their Homoiousion (of like substance). When one considers how the four creeds formulated at Antioch (341) by the Semi-Arians approached the Nicene Creed as nearly as possible without the actual word Homoousion, there may be a temptation to think that the question was one of words only; and the Councils of Rimini and Seleucia (359) may seem to have been well advised in their conciliatory formula “that the Son was like the Father in all things, according to the Holy Writ”. But this very formula was forced from the Fathers by the Emperor Constantius; and the force and fraud which the Semi-Arians used throughout the greater part of the fourth century, are proof sufficient that the dispute was not merely verbal. The dogma of the Trinity was at stake, and Homoousion proved itself to be in the words of Epiphanius “the bond of faith”, or, according to the expression of Marius Victorinus, “the rampart and wall of orthodoxy.” (See ARIANISM; TRINITY.)