(quote from RealReality.org/Real_Faith_and_Reason_Vol_2_-_Scientia.pdf)

We began trip 10 by reviewing what we learned on trips 1-9. What were the two most important truths we learned in those nine trips? Jesus Christ is real, knowable, and the only source of TRUTH. You must base your thoughts on TRUTH or your thoughts aren’t rational. Since rational thought requires TRUTH as a starting point, rational thought is impossible without Christ. The human mind is incapable of rational thought without Christ. Faith comes by hearing God’s utterance, His truth. That means sound reasoning is impossible without faith.