J.M.J. "212. Furthermore, once Mary has heaped her favors upon her children and her faithful servants and has secured for them the blessing of the heavenly Father and union with Jesus Christ, she keeps them in Jesus and keeps Jesus in them. She guards them, watching over them unceasingly, lest they lose the grace of God and fall into the snares of their enemies. 'She keeps the saints in their fullness' (St. Bonaventure), and inspires them to persevere to the end, as we have already said."
--Saint Louis Marie Grignion de Montfort, Treatise on True Devotion to the Blessed Virgin, 212.