Please, I doubt anyone can fully explain the trinity on this board. I cant even do it. The trinity is by far the most complex peice of dogma that the
Catholic church has. YOu can state the dogmas but to understand them is an entirely different thing. I know theology majors that cower from this
question simply because of the complexity of it. It is impossibly hard to comprehend/ understand. Least of alll explain.
I know Brothers who still dont fully get it. Believe me this is way over your head.
I can do my best to explain the catholic dogma but I dont even fully understnad it so I do not wish to. All I can say is that its all in the Niciene
Creed....
Keep on mind as you read the creed that all three of thr trinity are one nature. That is the devine nature. and each action is approprated to each
"person" of the devine nature. The divine nature is possesd by all of the three but it is one nature. THat devine nature is the nature of God. All
three are sepreate but one. One God. The son is God the Father is God and the Holy Spirit is God. There are not three gods but One and the three share
in the devine nature.....
(my gosh I cant believe im attempting this im goign to stop)
Read the creed and pay major attention to the commas. Each clause is important. When said in mass many over look it but it is a verry important peice
of theology it contains alot of information and enlightnemnet on the Trinity.
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,
of one Being with the Father.
Through him all things were made.
For us and for our salvation
he came down from heaven:
by the power of the Holy Spirit
he became incarnate from the Virgin Mary,
and was made man.
For our sake he was crucified under Pontius Pilate;
he suffered death and was buried.
On the third day he rose again
in accordance with 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 worshiped 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.

I hope that helps
- Mizar
Defender of the Heavens