So get rid of all uncleanness and the rampant outgrowth of wickedness, and in a humble (gentle, modest) spirit receive and welcome the Word which implanted and rooted [in your hearts] contains the power to save your souls. —James 1:21
Once you are born again, your spirit has been reborn and you will go to heaven when you die. But God is not finished—He is just beginning. You need to work out your own salvation with fear and trembling (Philippians 2:12 KJV). In other words, your soul needs to be saved. The 14 soul is often defined as the mind, the will, and the emotions. Each of these areas needs salvation.
The Holy Spirit works relentlessly to transform the whole man into God’s perfect will. This process is called sanctification. When your soul is renewed with His Word, you think His thoughts and not your own. Submit yourself to the Holy Spirit and allow Him to change every thought and motive.
From the book Ending Your Day Right by Joyce Meyer.