Complete Consecration to Mary V

"I have said that this devotion could rightly be called a perfect renewal of the vows and promises of holy baptism. Before baptism every Christian was a slave of the devil because he belonged to him. At baptism he has either personally or through his sponsors solemnly renounced Satan, his seductions and his works. He has chosen Jesus as his Master and sovereign Lord and undertaken to depend upon him as a slave of love. This is what is done in the devotion I am presenting to you. We renounce the devil, the world, sin and self, as expressed in the act of consecration, and we give ourselves entirely to Jesus through Mary. We even do something more than at baptism, when ordinarily our god-parents speak for us and we are given to Jesus only by proxy. In this devotion we give ourselves personally and freely and we are fully aware of what we are doing.
In holy baptism we do not give ourselves to Jesus explicitly through Mary, nor do we give him the value of our good actions. After baptism we remain entirely free either to apply that value to anyone we wish or keep it for ourselves. But by this consecration we give ourselves explicitly to Jesus through Mary's hands and we include in our consecration the value of all our actions."

Source: St. Louis de Montfort's True Devotion to Mary