In saints like John Vianney, we get a glimpse of the end of the world, of the final conquest of evil by good. We get a taste of the time when every tear shall be wiped away, every wrong made right, where justice and mercy consummate history, and where God shall be all in all.
Mary’s Immaculate Heart is only so pure and holy by the grace of God, by reason of her relationship with God. That’s why the Church dedicates the month of August to the Immaculate Heart of Mary.
We are summoned as Christians to put God in first place in our lives. That means we become supple to His will, and toughened against the world, the flesh, and the devil.