St. Louis de Montfort Act through Mary
48. 3. We must never go to our Lord except through Mary, using her intercession and good standing with him. We must never be without her when praying to Jesus.
Act for Mary
49. 4. We must perform all our actions for Mary, which means that as slaves of this noble Queen we will work only for her, promoting her interests and her high renown, and making this the first aim in all our acts, while the glory of God will always be our final end. In everything we must renounce self- love because more often than not, without our being aware of it, selfishness sets itself up as the end of all we work for. We should often repeat from the depths of our heart: “Dear Mother, it is to please you that I go here or there, that I do this or that, that I suffer this pain or this injury.”
50. Beware, chosen soul, of thinking that it is more perfect to direct your work and intention straight to Jesus or straight to God. Without Mary, your work and your intention will be of little value. But if you go to God through Mary, your work will become Mary’s work, and consequently will be most noble and most worthy of God.
http://www.ewtn.com/library/Montfort/SECRET.HTM#3.%20Supplement
Those who live for her will die without Christ.