How you think determines who you are. However, renewing your mind isn’t just about how you think, for that gets into willpower and putting forth effort. Renewing your mind and believing in your heart includes intention and conceiving God’s promise in your heart. Once it’s conceived, there is a capacity that this is possible. Then it turns into a definitive decision that you are going to change the quality of your life based on the fact that you are created in the likeness of God.