The Holy Spirit Within: God’s Guarantee

When Jesus took our sin upon Himself, He freed us from sin’s consequence—separation from God. When we receive Christ, we are securely joined to Him through the indwelling presence of the Holy Spirit. His Spirit residing within is our guarantee of all that God has promised.
        The death and resurrection of Christ as it relates to our own death and life in Him is a recurring theme in Scripture. Being united with Jesus in His death allows us to also share in the benefits of His resurrection. Understanding this principle is vital to our spiritual growth.
        At the very heart of this truth is the fact that freedom from the power of sin—our death to sin—is guaranteed by our freedom from law. Freedom is now the absolute reality of our life in Christ, because we are no longer bound by what Paul calls “the law of sin and death.”

From Free from the Power of Sin: the Keys to Growing in God in Spite of Yourself