Our Lady told the visionaries that her Immaculate Heart would be their refuge and lead them to God. With all that is going on in our world today, we need to find such a safe place. Mary was never touched by sin, and can inspire us to always fulfill the will of God.
The pastor in Lourdes didn't believe that St. Bernadette was receiving apparitions of Our Lady. To prove that it really was Our Lady, St. Bernadette was told to ask Our Lady one thing.
Father Joe tells how Francisco was a "little contemplative"; he would retreat to the attic of his house to escape the crowds, be quiet, and listen to God.
The Fatima visionaries were given a vision of hell that made a tremendous impression upon them.