Brother, you can not believe in something you don't "know". Faith comes from knowing the Word in which we speak that brings the faith so we can believe in what we know. Truth has never at any time set a person free. It's not until we "know" the truth that it sets a man free as Jesus said. (John 8:31 -32)
Faith does not come by knowing, but according to my Bible, by "hearing":
"So then faith cometh by hearing, and hearing by the word of God." Rom 10:17
Jesus spoke against those who looked for knowledge instead of stepping out in faith. Why do we suppose that was? Consider what Jesus said to Thomas:
"Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed." John 20:29
What is seen by only the natural eye is really seen by a blind man. A spiritually blind man cannot see the things of God and he cannot lead anyone deeper into God's truth because he really does not KNOW what it is. He is blind and cannot see:
"And he spake a parable unto them, Can the blind lead the blind? shall they not both fall into the ditch?" Luke 6:39
But long before Jesus was born to Mary in Bethlehem, Solomon wrote these words:
"Where there is no vision, the people perish... " Prov 29:18
The apostle Paul also wrote of this vision but his verse makes it clear that it was not yet really clear, but "as through a glass darkly":
"For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known." I Cor 13:12
We cannot "know" because we cannot see clearly. How do improve or get our vision improved?
Jesus did it here:
"And he took the blind man by the hand, and led him out of the town; and when he had spit on his eyes, and put his hands upon him, he asked him if he saw ought.
And he looked up, and said, I see men as trees, walking.
After that he put his hands again upon his eyes, and made him look up: and he was restored, and saw every man clearly." Mark 8:23-25
But how are we to do it?
"I counsel thee to buy of me gold tried in the fire, that thou mayest be rich; and white raiment, that thou mayest be clothed, and that the shame of thy nakedness do not appear; and anoint thine eyes with eyesalve, that thou mayest see." Rev 3:18
What else would this eyesalve be but the Holy Ghost, the Holy anointing of God?
How much do we know and how much do we only believe? I suspect that no one here can honestly draw the line between
what they know of the things of God and
what they only believe. Certainly we have knowledge, but any of us who started out as Catholics did have knowledge as well. Some of our knowledge was wrong. Why was it that God called us out of "her"? Has anyone ever been called out of places other than Catholicism?
Faith should be moving toward knowledge. For anyone who is growing toward God by allowing the Holy Spirit to work in them. This is moving from that "as through a glass darkly" toward that "face to face". Consider this verse:
"Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God." Heb 12:2
Notice that Jesus is the author [initiator or beginner] of our faith, but he is also the finisher thereof. The beginning is faith alone but the end is knowledge, not according man knowledge which he learned through all of his studies, but through the working of the Holy Spirit on the inside. When the work of faith is completely finished we should have only knowledge, but who can get there by his brain power? No one! The Way to the knowledge of God is through faith. If it were not so then the ones with Einstein-like brains who were good students would be the closest ones to God. This is NOT how it is.
Give God the glory!