Consubstantial
The notion of consubstantial is introduced by the fathers of the First Council of Nicaea in 325. By this, the bishops present at the council condemned the theories of Arius by which the Son being a creature, it could be the same substance as the Father.
To clarify the doctrine, this council made the choice of the Greek word homoousios that translates the French word consubstantial, meant to evoke the unity and identity of substance (as opposed to the Arians, who maintained he was different, anomoios , and those who argued that it was essentially similar homoiousios, but not identical) although the word did not appear in the Septuagint. This term was later applied in the construction of dogma Trinity at Holy Spirit.
The problem of consubstantiality the heart of matters Christological , should not be confused with the problem of the filioque , which divides the churches of East and West.
See also
Controversies of the early centuries
