(quote from RealReality.org/Real_Faith_and_Reason_Vol_3_-_Scientia.pdf)

Anyone who tries to reason beyond his or her senses without the light of Christ is going to be irrational because of the way truth and logic work. The further people extend reasoning beyond what they observe and test, the more irrational they become.

God reveals Himself to every person, so no one has an excuse. God also reveals Himself to atheists and agnostics. They know. Deep down inside, they know and often react in anger toward even the concept of God.

(end quote)