The Holy Spirit is the master of the interior life. By giving birth to the "inner man," justification entails the sanctification of his whole being:
Just as you once yielded your members to impurity and to greater and greater iniquity, so now yield your members to righteousness for sanctification.... But now that you have been set free from sin and have become slaves of God, the return you get is sanctification and its end, eternal life.
Source: Catechism of the Catholic Church (Vatican.va)