Someone once asked . . . .
How does human reason understand the belief that Jesus is both FULLY human and FULLY divine?
Humans cannot “reason” this.
With God, there will be truths that are ABOVE mere human reason.
You CAN know somethings about such truths.
You can probe such truths.
But you can never fully understand such truths via human reason.
Such truths that are ABOVE reason are called “mysteries”.
The one error that atheists (nobody on this thread) all have is they DENY the existence of truths that are above mere human reason.
If everything associated with “god” was reducible down to mere human reason . . . . you can bet this is NOT God.
So in other words, we would EXPECT mysteries or truths that are ABOVE reason.
Q: OK Cathoholic. But HOW do you know about such truths if they are ABOVE reason?
A: We must have them REVEALED to us by God.
He can do this directly or indirectly.
The Incarnation or Jesus as True God (I Am Who Am) and True Man (taken flesh of the Virgin Mary to Himself by the Holy Spirit 2000 years ago) is such a truth. It is above reason. It is a mystery.
Other mysteries include the Trinitarian nature but preservation of “one” with God.
Why an all good God, allows evil.
And others.
Baptism allows us to believe these truths in a way we could not believe them without Baptism (which is part of the reason why Baptism is sometimes called “The Sacrament of Faith”. We have a supernatural faith, hope, and charity poured or sprinkled into us when we are Baptized. With Baptism we are re-birthed of water and the Spirit. With Baptim we have the Spirit of God sprinkled into us in a special way (as Ezekiel says we would).
EZEKIEL 36:24-28 24 For I will take you from the nations, and gather you from all the countries, and bring you into your own land.
25 I will sprinkle clean water upon you , and you shall be clean from all your uncleannesses, and from all your idols I will cleanse you.
26 A new heart I will give you, and a new spirit I will put within you ;
and I will take out of your flesh the heart of stone and give you a heart of flesh. 27 And
I will put my spirit within you ,
and cause you to walk in my statutes and be careful to observe my ordinances. 28 You shall dwell in the land which I gave to your fathers; and you shall be my people, and I will be your God.
Q: OK Cathoholic. But HOW do you TRUST such truths so as to “reveal” them to us?
A: The Resurrection of Jesus Christ. The Resurrection and reliable witnesses (martyrs) to the Risen Christ along with grace.