Originally Posted by CHESTERTONRULES
Absolutely, but Divine Providence.
Any time we get into such a discussion there has to be an understanding of the unwritten caveat of “To the best of my knowledge”. This appies in this case as well.
When someone Chooses to join the Catholic Church, they certainly CAN be said to be relying on their own understanding at that time. - OR - They can be considered as having been enlightened by God with the wisdom to come home to the Church. Which would be, not their understanding but God’s action in them.
Non-catholics on the other hand, have a similar issue only multiplied. When you read and try to understand the Bible, how do you discern if you are leaning on your own understanding each time or are being given understanding by the Holy Spirit?
The Catholic, by prayerfully submitting his will to Christ Through the Church, enjoys the advantage of having the sum total of nearly 2000 years of Scholarly thought and magisterial teaching to go on. Each non-catholic must, “reinvent the wheel” for himself.
I didn’t explain that very well - so please don’t hold my feet to the fire on it.

I guess what I am trying to say is that, as far as a faith decision goes it is hard to call it ciercular reasoning or the action of God.
Peace
James