Most churches follow the agreement established by the major ecumencial councils which resolved that Jesus is the same substance as the father or of one being - homoousios
The council of Chalcedon's in AD451 affirmed that Christ is acknowledged in two natures, which some together into one person and one hypostasis
The Council of Chalcedon's definition is not recognised by any Oriental Orthodox Church and, as a result, these churches may be classified as non-Chalcedonian
Chalcedon principle established a key principle that as long as it is acknowledged that Jesus is both truly divine and truly human, how this is possible is not a question of central importance