Whoever is in Christ is a new creation; the old has passed away. Now by the “new creation” Paul means the indwelling of the Holy Spirit in a heart that is pure and blameless, free of all malice, wickedness or shamefulness. For when a soul has come to hate sin and has delivered itself as far as it can to the power of virtue, it undergoes a transformation by receiving the grace of the Spirit. Then it is healed, restored and made wholly new. Indeed the two texts: Purge out the old leaven that you may be a new one, and: Let us celebrate the festival, not with the old leaven but with the unleavened bread of sincerity and truth, support those passages which speak about the new creation.