Our mind need not stand isolated.  One of the things that we need to realize is that our mind is connected to the Infinite Mind.  Our rationality is an expression of that Mind.  Our mind can be in touch with His Mind.  We need its communication.  The history of Biblical revelation is that this Infinite Mind has chosen to make Himself known to us.  The sum of that revelation is Jesus of Nazareth, who is made to us “wisdom from God” (I Cor 1:30).  In Him God still speaks!

“For who has known the mind of the Lord so as to instruct him? But we have the mind of Christ.” 1 Corinthians 2:16 (NRSV)