To let go of the old lifestyle that we learned from the sinful nature before we got saved, we must recognise the condition of our soul. Our soul which comprises of our mind, will and emotions was not saved when we received Christ and was corrupted by the sinful desires and passions of the old nature.
Although our spirit is saved and is now holy, we must commit ourselves to planting the word of God in our hearts through meditation in order to experience and live out the new life we now have in our spirit.