Put on the new self who is being renewed to a true knowledge according to the image of the One who created him. . . (Col 3:10)
And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is that which is good and acceptable and perfect. (Rom 12:2)
Renewal is a choice, a way of thinking, an opening of the mind to the pattern of Truth. It doesn't happen automatically. Renewal happens when we make a regular habit of facing ourselves with the mirror of God's image. It seems to be glass at first, but as we look further up and further in the glass melts into a pool of unfathomable depth and beauty. We need habits of renewal which cause us to gaze intently, drink deeply, and dive joyfully into all that God is.
Brother Lawrence speaks to this habit-making:
"We cannot escape the dangers which abound in life without the actual and continual help of God. Let us, then, pray to Him for it continually. How can we pray to Him without being with Him? How can we be with Him but in thinking of Him often? And how can we think of Him but by a holy habit which we should form of it? You will tell me that I am always saying the same thing. It is true, for this is the best and easiest method I know; and as I use no other, I advise all the world to do it. We must know before we can love. In order to know God, we must often think of Him; and when we come to love Him, we shall also think of Him often, for our heart will be with our treasure. This is an argument which well deserved your consideration."