My mother-in-law was a cradle Catholic.  In the twenty years I knew her she never once missed Mass.  Her faith in god was certain and she lived to serve others,  although never in an evangelical way.  She rarely spoke of her faith. Although she was very intelligent she was not an educated woman.  I'm not sure she even finished fourth grade.  She lived her life for and amongst her extended family, only once venturing out of the country shortly after her husband's death.