Mary is the great, unique mold of God

We must do everything with Mary: in all our actions we must look upon Mary, although a simple human being, as the perfect model of every virtue and perfection, fashioned by the Holy Spirit for us to imitate, as far as our limited capacity allows. In every action then we should consider how Mary performed it or how she would perform it if she were in our place.

For this reason, we must examine and meditate on the great virtues she practiced during her life, especially:

1) Her lively faith, by which she believed the angel's word without the least hesitation, and believed faithfully and constantly even to the foot of the Cross on Calvary. 
2) Her deep humility, which made her prefer seclusion, maintain silence, submit to every eventuality and put herself in the last place.
3) Her truly divine purity, which never had and never will have its equal on this side of heaven. And so on for her other virtues.

Remember what I told you before, that Mary is the great, unique mold of God, designed to make living images of God at little expense and in a short time. Anyone who finds this mold and casts himself into it, is soon transformed into our Lord because it is the true likeness of him.

Saint Louis-Marie Grignion de Montfort

Treatise on True Devotion to the Blessed Virgin Mary § 260.2