Romans 12:2

And do not be conformed to this world (any longer with its superficial values and customs), but be transformed and progressively changed (as you mature spiritually) by the renewing of your mind (focusing on godly values and ethical attitudes), so that you may prove what the will of God is, that which is good and acceptable and perfect.

The word of God develops our spirits and transforms us from the inside out. We must practice transforming our spirits by studying the word so that our spirits control our actions and reactions daily. We need to renew our minds so our spirits can practice peace, self-control, and resistance to fear and not be affected by what is happening around us.