What must do with our Heart
The old heart as part of the old nature must change. Our souls part which is the will, the mind and the emotions have learned the attitudes of sin and they need to change - as Romans says we need to be renewed in our mind. We cannot consider ourselves OK when we start to walk the new walk with the Lord - there is a list of attitudes that we have never even understood and they are responsible for when they Bible don't seem to work for us. We may walk depressed and in anxiety just because there are a lot of leftover wrong attitudes in us. We have learn new habits according to the new decisions that we make