What does the Bible say about God's work in our hearts?

According to Philippians 2:13, it is God who works in us both to will and to do of His good pleasure. This means that our spiritual desires and actions are the result of God's continual work within us. Our natural inclination is to rebel against God, but it is by His grace that we are enabled to will and act in accordance with His will. It offers great comfort, especially when we recognize our own inability. Paul affirms that it is God who enables us, and without His intervention, we would remain in a state of spiritual deadness (Ephesians 2:1).