There is Actual Grace. To help us resist temptation. The Rosary is very powerful, but not as powerful as the sacraments. Actual Grace is a supernatural help of God.
Sinners need actual Grace to rise from sin. For an example: You may have come across stories(true) those not in Sanctifying Grace, told to say "Hail Marys" and have visions of Mary to receive the Sacrament of Baptism. Actual Grace is made to act through sermons, reading good books(bible). You could ask for Actual Grace when giving advice , good example.