God the Father Almighty
From the Catechism of the Catholic Church, Simplified
God - Father - Creation (198)
The Creed begins with God (the beginning and end of all creation), with the Father (the first Divine Person), and with creation (the first of God's works).
First Truth - God (199)
"I believe in God" is the most fundamental affirmation, because the whole Creed speaks of God, and man's relationship to him.
God is One (200-201)
"I believe in one God." The Nicene Creed shows that belief in God's oneness and God's existence are inseparable and fundamental. "The Lord our God is one Lord" (Deut 6:4). "God is one in nature, substance and essence" (Roman Catechism).
The prophets called Israel to fidelity. "Hear O Israel for I am God and there is no other" (Deut 6:4-5). They call us to adore one God. "To me every knee shall bow and every tongue shall swear" (Isa 45:22-24).
No Division (202)
Jesus says there is "one Lord" (Mk 12:29-30) and yet Jesus says that he is "the Lord" (Mk 12:35-37). Therefore, Christian faith confesses that Jesus is Lord and the Holy Spirit is "the Lord and giver of life." Yet there is no division in God. "There is only one true God, eternal, infinite and unchangeable, the Father and the Son and the Holy Spirit; three persons but one essence" (Fourth Lateran Council).
The Name Revealed (203-204)
In the Old Testament, God revealed his name. By doing this, God made himself more accessible and invited us to know him better.
Although God revealed many names to Israel, the name he used when speaking with Moses was "Yahweh" - "I AM WHO AM" (Eccl 3:13-15).