Our Christian faith is summarized by the Nicene-Constantinopolitan Creed which is shown below.
Nicene Creed
We believe in one God, the Father, the Almighty, maker of Heaven and Earth, of all that is seen and unseen.
We believe in one Lord, Jesus Christ, the only Son of God eternally begotten of the Father, God from God, Light from Light, true God from true God, begotten, not made, one in being with the Father. Through Him all things were made.
For us men and for our salvation he came down from heaven: by the power of the Holy Spirit he was born of the Virgin Mary, and became man.
For our sake he was crucified under Pontius Pilate; he suffered, died, and was buried.
On the third day he rose again in fulfillment of the Scriptures;
He ascended into heaven and is seated at the right hand of the Father. He will come again in glory to judge the living and the dead, and his kingdom will have no end.
We believe in the Holy Spirit, the Lord, the giver of life, who proceeds from the Father and the Son. With the Father and the Son he is worshipped and glorified. He has spoken through the prophets.
We believe in one holy catholic and apostolic Church. We acknowledge one baptism for the forgiveness of sins. We look for the resurrection of the dead, and the life of the world to come. Amen
“who proceeds from the Father and the Son.” This is not the original text of the Credo in question but an addition made in the 6th and finally made obligfatory in the 11th century. And this is just one example I am afraid.
You are referring to what is known as the ‘filioque’a term which means ‘and from the Son.’This was the center of a controversy between the Eastern Churches and Rome, ie. the Catholic Church. The Eastern Churches objected to this phrase which was added by the Roman Church many centuries after the Nicene Creed was formulated and also lead to the separation between the Eastern and Western Churches. However recognizing Christ’s divinity it is apparent that the Holy Spirit proceeds from both the First and the Second Persons of the Holy Trinity.
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