In theological literature, the colloquial Greek term oikonomia has several meanings, and only becomes a theological concept through its context. In the New Testament, it signifies God's rule, but it is not originally connected with the notion of salvation. The internal relationship of the Trinity can be signified with oikonomia, as can the union of two natures in Christ. In the Eastern Church, oikonomia is part of the features of ecclesiastical praxis and finds its way into the Byzantine notion of law. It is also of significance for ecumenical efforts.