Not true, yes the Holy Spirit is our helper. However, God gave us brains, documents and truth. This kind of “you can’t know unless….,” talk is crazy. I agree the spirit will give you knowledge and understanding if that is your request, it is a Holy One. But the truth in our times is well documented. Non-believers can still learn about the Man of Jesus and his message. The almighty God, predestined his elect before time began. Might faith be gained through intellectual vigor? Yes, Absolutely.