'Tis common to hear warnings from Christians about having a "head knowledge" of the Lord, but not having Him firmly implanted in the heart. In other words, some have great intellectual knowledge of the Lord, His Word, and His doctrine, but don't actually experience a life in communion--an experiential knowledge, if you will. In my experience, this is true: there are some who are all intellect and no experience and personal growth resulting from that intellect.
On the other hand, this warning seems to have been heeded too much in Christian circles today. Today, far too many believers (the vast majority, in my experience) have plenty of heart-knowledge and practically no intellectual understanding of their Lord, bubbleheads. How can one consider himself a mature believer if he cannot defend his faith logically, if he cannot properly identify enemies of the faith, if he cannot even reconcile the Genesis account of creation and scientific observation? If he cannot even address some of the most basic tenets of doctrine, why should anyone turn to him for leadership, discipleship, or even for a pointer toward salvation? He is a bubbleheaded Christian. » read more »