A person's devotion to the Blessed Mother is demonstrated by the holy prudence, charity, obedience, meekness and humility, since these virtues were demonstrated by her most prominently.
We cannot say that we love the Lord if we do not love the woman chosen for all eternity to be his Holy Virgin Mother. We cannot say that we love the Blessed Virgin if we choose to trust more in ourselves than in Christ. If we do not avoid unnecessary near occasions of sin, then we cannot be children of Mary, Mediatrix of All Graces. We must instead say as our Blessed Mother for our role model on how to truly love Jesus with our hearts, "Fiat! Be it done unto me according to Thy will."