The equation I’ve seen for the Trinity is 1 x 1 x 1=1
The Trinity isn’t illogical or unreasonable, just beyond reason. God is spirit, so He isn’t composed of parts as we are. He can be three distinct Persons without being divided up. If God were just one Person, it would make nonsense of much of the Gospels.
“For I did not speak of my own accord, but the Father
who sent me commanded me what to say and how to say it.” John 12:49
“Do not let your hearts be troubled. Trust in God,
trust also in me." John 14:1
The Father sent Jesus and Jesus says to trust the Father and “also” in Him – He and the Father are distinct Persons
"Believe me when I say that I am in the Father and the Father is in me.**” John 14:11
“On that day you will realize that ***I am in my Father, and you are in me, and I am in you.” ***John 14:20
Jesus is in the Father and the Father in the Son but they are distinct just as we are in Jesus and He in us, but we are distinct from each other.
“Jesus replied, 'If anyone loves me, he will obey my teaching. My Father will love him , and ***we will come to him and make our home with him.” ***John 14:23
Jesus says “we” (He and the Father) will come to and make their home with the one who loves Jesus – if Jesus and the Father were the same Person, “we” would be a strange way of referring to Himself
“And
I will ask the Father , and
he will give you another Counselor to be with you forever–
the Spirit of truth.” John 14:16-17 Again, Jesus “asks” the Father (why ask if He’s the same person?) and says the Father will give “another Counselor” – again, another Person, not the same as the Son or the Father.
The voice of the Father at Christ’s Baptism “This is my son, whom I love; with him I am well pleased.” (Matt 3:17) This is the Father speaking of Jesus as another Person, His Son --a strange manifestation if the Father and Jesus were the same Person. This is repeated at the Transfiguration.
One thing that might help you is to read about what the Trinity means for us. When I was Protestant, I always accepted the doctrine of the Trinity, but I didn’t really understand the implications of the teaching for us. Of all places I found that in John Paul II’s “Theology of the Body.” Christopher West has written two excellent books that make it understandable for the average layman, “*Theology of the Body for Beginners” *and “*Theology of the Body Explained.” *If you study this, I think the meaning of the Trinity will become clearer to you.
God bless!