Romans 12:2

Romans 12:2 And do not be fashioned according to this age, but be transformed by the renewing of the mind that you may prove what the will of God is, that which is good and well pleasing and perfect.

Romans 12:2 tells us that we need a renewed mind. The mind is renewed not only by outward teachings, but by the element of Christ being added to it. When the Lord Jesus spreads Himself from our spirit into our mind, our mind will be renewed. By the renewing of our mind our soul is metabolically changed. In this way we experience transformation in our soul, a necessity for the church life. If we intend to practice the church life, we need to experience such a transformation in our soul by the renewing of our mind. 

- "Life Study of Romans" P302