How are their lives an example of the sacrament that “the Church gives us everything we need to become saints”? How does the Church give you everything you need to become a saint?

Louis and Zelie Martin had nice children, but only five girls survived.  Four of the girls, Marie, Pauline, Therese and Celine, became Carmelite nuns; the fifth girl, Leonie, became a Visitandine num.  Therese, the Little Flower, was canonized a saint and named a Doctor of the Church.  Ninety years later, Louis and Zelie became the first married couple to be canonized as saints together.  How are their lives an example of the sacrament that “the Church gives us everything we need to become saints”?  How does the Church give you everything you need to become a saint?