It is a call to follow the example of Mary’s heart. We are to Love Jesus Christ, He is God. Our salvation would be assured if we loved Him with Mary’s heart. The second verse of the hymn “Jesus, My Lord, My God, My All” is:
Had I but Mary’s sinless heart,
To love thee with, my dearest King;
O! With what bursts of fervent praise,
Thy goodness, Jesus would I sing.
The “Totus Tuus” prayer of John Paul II goes further:
Immaculate Conception, Mary my Mother,
Live in me, Act in me,
Speak in me and through me,
Think your thoughts in my mind,
Love through my heart,
Give me your dispositions and feelings,
Teach, lead me and guide me to Jesus,
Correct, enlighten and expand my thoughts and behavior,
Possess my soul,
Take over my entire personality and life, replace it with Yourself,
Incline me to constant adoration,
Pray in me and through me,
Let me live in you and keep me in this union always.
I feel that many non-catholic Christian faiths don’t have a firm understanding of who Jesus Christ is within the Trinity, so they replace Mary with Jesus in some ways. Such as the “What would Jesus do?” folks have. The question should be, “What would Jesus have me do?” Jesus is God, co-eternal with the Father and the Holy Spirit, God’s Word Incarnate. We can follow Him, but we can not be Him. We can not think His thoughts, we can not do everything that Jesus can do.
John Chapter 1
 In the beginning was the Word, and the Word was with God, and the Word was God.
 He was in the beginning with God;
 all things were made through him, and without him was not anything made that was made.
Mary was totally human, she was not divine. She is a model for us in a way that Christ can not be, because we can never be God. The best we can hope for is to follow Christ as perfectly as His mother Mary did. To follow willingly, adoringly, without question, wherever we are led (even if that place is somewhere we do not want to go, to see things we do not want to see), loving, constantly loving Him. If only we could adore Him as His mother did. During the Passion and death of our Lord, the apostles abandoned Him. Mary went to her son during this time, and followed Him unto the point of death. Mary was at the tomb when the resurrection was discovered. Mary followed Christ, and supported Him, all the days of His earthly incarnation. She is our example of how we should behave, what God wants us to do. God does not want us to be like Him, He wants us to be for Him, to love Him in everything, in our whole being. Our salvation is through the obedience and willingness of the heart of Mary to serve God (Jesus), without question, without even a moment’s hesitation. To posess and love the heart of Jesus, we must love Him with the heart of Mary. That is how the sweet heart of Mary is our salvation, that we love our Savior with the sweet heart of Mary.
I hope that made sense, and wasn’t just a bunch of rambling. I’m feeling a bit dizzy now…