True change must be in the mind, in the heart (for the heart in biblical anthropology entails the mind, affections, will):
And this transformation of character is to be sought for “by the renewing of the mind.” “The renewing of the mind” is not descriptive of some physical operation—such as the putting a new thinking principle into the individual, or even the superadding of some new, physical capacity of thought and feeling to the intellectual and moral frame of our nature: the mind is renewed when, under the influence of the Spirit, the truth is understood and believed, so as to displace the ignorance and error that previously prevailed. It is the truth, understood and believed, that purifies the heart from the love of the world; and, just in proportion as that truth is understood and believed, are men transformed. It is by men’s being formed to a right way of thinking, that they are formed to a right way of feeling and acting with regard to this world and the next—to God, and our brethren of mankind.
ANALYTICAL EXPOSITION of THE EPISTLE OF PAUL THE APOSTLE to
THE ROMANS, 1857, pages 437-438
BY JOHN BROWN, D.D.,