It is possible for a child of God to have a new life and a new heart but be without a new head. With too many saints, the mind, though their heart is new, is still quite old.
Their heart is full of love whereas their head is totally lacking in perception. How often the intents of the heart are utterly pure and yet the thoughts in the head are confused. Having become saturated with a mishmash of everything, the mind lacks the most signal element of all, which is spiritual insight.
Countless saints genuinely love all children of God, but unfortunately their brain is stuffed with a hodgepodge of theories, opinions and objectives.
Quite a number of God’s best and most faithful children are the most narrow-minded and prejudice-filled. Already have they decided what is the truth and what truth they shall accept. They reject every other truth because these do not blend in with their preconceived notions. Their head is not as expansive as their heart.
Moreover, there are other children of God whose mind can conceive no thought whatever. No matter how many truths have been heard they can neither remember nor practice nor communicate them to others. These have certainly heard a lot, yet they possess no ability to express any of it. For many years they have received truths, but not even a little can they supply for the needs of others. Perhaps they may even brag how full they are of the Holy Spirit! What creates such symptoms is an unrenewed mind.
Man’s head damages people more than man’s heart! Were believers to learn how to distinguish the renewal of heart from the renewal of head, they would not commit the mistake of believing in man. Christians ought to realize that even one who maintains a most intimate fellowship with God may nevertheless unknowingly have accepted Satan’s suggestions in his mind, which consequently precipitate errors in his conduct, words and viewpoints!
Aside from the plain teaching of the Bible, no man’s words are entirely trustworthy. We must not live by a man’s words just because we admire or respect that man. His utterance and conduct may be most holy but his thought may not be spiritual. What we therefore observe is not his speech and behavior but his mind. Were we to believe, because of one’s life conduct, that what a worker says is God’s truth, we would then be making man’s word and demeanor our standard of truth instead of the Bible.
History is strewn with innumerable cases of sanctified saints who propagated heresies! The simple explanation is that their hearts were renewed but their minds remained old. We will undeniably acknowledge that life is more important than knowledge. Indeed, the former is a thousand times more consequential than the latter. Nonetheless, after some growth in life it is essential to seek the knowledge which proceeds from a renewed mind. We should see how urgent it is for both heart and head to be renewed.
From The Spiritual Man by Watchman Nee.