DUE TO MY active involvements in the discussion of the Catholic faith even with non-believers, I repeatedly encounter in the past a puzzling condition, a kind of hardcore obstinacy that almost always prevents non-Catholics from opening up intellectually at least to understand the very reason why Catholics behave the way we do and believe the way we do.
In the issue of venerating the images of dearly loved Saints, it seems to be so hard to extract them from equating images (representation of real people) with idol (representation of a god) worship to translate much like "worshipping" the photo of your late dear mother that you keep in your wallet to remind you of her. The deception in their mind had been so thorough that even clear logic cannot help in helping them at least to intellectually consider the reason for such a family-oriented practice.
In the issue of the teaching authority of the Catholic Church as historically the very Church that the Lord Jesus Christ left to the administration of the Apostle Peter before his ascension to Heaven, their adamant refusal to recognize the historical proof of the Apostolic Church borders on the irrational as all of these can be found, by reflective reading, in the Christian Bible (which they too use with their specific modifications of the original) and the historical evidence can be gathered from credible sources to make at least an intelligent evaluation of the facts of such direct lineage to the Apostles of Christ.
What Jesus however taught privately to his disciples, as recounted in the Gospel of Saint Mark (4:11-12), clears up this very dynamic difference in the presence of divine revelation between those within the Church and those outside: The mystery of the kingdom of God has been given to you. But for those outside everything comes in parables, according to what is written in Scripture: These people may look, yet not see; hear, yet not understand; surely they will not change nor receive forgiveness. Saint Mark then proceeded to confirm: Jesus... would not teach them without parables; but privately to his disciples he explained everything (v. 34).
The mystery of the kingdom of God has been given to you... The full revelation of the Lord Jesus Christ resides among the Twelve Apostles, the first elders in the ancient Church; not even solely to the writings in the compiled books, which we now call the Bible, that came to the Church hundreds of years later. It resides in the hearts of the Apostles, and they transmitted it through the centuries to a long line of faithful disciples. And where the ancient revelation remained incomplete the Holy Spirit supplied later on as He guided the Church through various stages of growth. This verse alone testifies to the fact that Jesus himself chose whom to reveal his purest teachings--the Twelve. And all those faithful disciples who received the teachings of the Twelve received what the Lord taught them. That's how the teaching authority of the Twelve got handed down from generations to generations of Christians, which later became popularly known as Katolikos (Universal).
For those outside, everything comes in parables... This explains what I noticed as a severe case of hardcore obstinacy in those non-Catholics I encountered in the past and keeps on encountering once in a while. Despite any learned discussion on the faith of the Catholics, everything always comes to them in parables. What is easily understandable even to the least taught Catholic will prove to be unpenetrable a parable to the outsiders.
These conditions of parables indicate the absence of grace in their mind. Since the grace of God continue to be available and offered to everyone, this lack of grace might a result of a spiritual blockage that the person himself is not aware of or put there himself for whatever reason.
It is unfortunate that certain truth of faith cannot enter into the heart and mind of people who continue to refuse to open up their heart and mind to the Gospel that Christ handed down to his disciples, and then to their students and successors. It is like the unfertile soils in the same Gospel of Mark--some of the seed fell along a path and the birds came and ate it up (Mark 4:4)
