We believe in one God.... We believe in one Lord, Jesus Christ....” — Nicene Creed
"There is one Lord, one faith, one baptism, one God and Father of all who is over all and through all and in all."[Eph. 4:5-6]" One describes the unity of the body of Christ. These words from the Creed speak of the followers of Jesus Christ as united in their belief in one God, one Lord, Jesus Christ. In the "Upper Room" (possibly the Cenacle) Discourse—Jesus' final interaction with his disciples on the night of his arrest—Jesus prayed three times the same request—that we may "be one."[Jn 17:20-23]" He prays for Christians to have unity, saying this unity will provide the most compelling evidence to the world that he is the Savior of the world.
The word holy means set apart for a special purpose by and for God. It does not imply that the members of the Church are free from sin, nor that the institution of the Church cannot sin. Christ's Church is holy because it is Christ's Church: "...upon this rock I will build my Church."[Matt. 16:18] Jesus founded his Church to continue his redemptive and sanctifying work in the world. Christians understand the holiness of the universal Church to derive from Christ's holiness.[Matt. 16:19]
The word "catholic" means "universal" according to most Western interpretations, pronouncing the universality of Christ's church. It refers to the wholeness and totality of all true believers in Jesus as the Christ. The Church as the Body of Christ is not limited to a time, place, race or culture. Protestants believe that it encompasses every Christian of any denomination, even though they each hold to certain distinctive doctrines, beliefs, practices, and social views. On the contrary, Roman Catholic and Orthodox interpretations make a distinction between actual geographical universality and completeness of the true faith that is intended for all, whether they accept it or not:
Then Jesus came to them and said, "All...