Enlightenment is not 'Intellectual'

A University Professor went to see Nan-in, a Zen Master, to find out more about Zen.
As their meeting continued Nan-in was pouring Tea and continued to pour even though the cup was overflowing. The Professor cried. "Enough! No more will go in!"
Nan-in replied "Like this cup you are full of your own opinions and speculations. How can I show you Zen unless you first empty your cup?"

This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind. Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:
St. Paul

Trust in the Lord with all thine heart; and lean not unto thine own understanding. In all thy ways acknowledge him, and he shall direct thy paths. Be not wise in thine own eyes: fear the LORD, and depart from evil. It shall be health to thy navel, and marrow to thy bones.
The Book of Proverbs