An extract from 'True Devotion to Mary by St. Louis Marie de Montfort'
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Finally, chosen souls keep to the ways of the Blessed Virgin, their loving Mother - that is, they imitate her and so are sincerely happy and devout and bear the infallible sign of God's chosen ones. This loving Mother says to them "Happy are those who keep my ways", which means, happy are those who practice my virtues and who, with the help of God's grace, follow the path of my life. They are happy in this world because of the abundance of grace and sweetness I impart to them out of my fullness, and which they receive more abundantly than others who do not imitate me so closely. They are happy at the hour of death, which is sweet and peaceful for I am usually there myself to lead them home to everlasting joy. Finally, they will be happy for all eternity, because no servant of mine who imitated my virtues during life has ever been lost.
On the other hand, sinners are unhappy during their life, at their death, and throughout eternity, because they do not imitate the virtues of our Lady. They are satisfied with going no further than joining her confraternities, reciting a few prayers in her honor, or performing other exterior devotional exercises.
O Blessed Virgin, my dear Mother, how happy are those who faithfully keep your ways, your counsels and your commands; who never allow themselves to be led astray by a false devotion to you! But how unhappy and accursed are those who abuse devotion to you by not keeping the commandments of your Son! "They are accursed who stray from your commandments."