Mary proclaimed herself the handmaid of God while she became His Mother

"The Virgin Mary passed her life in obscurity, in a humble town, in a home humbler still, the more content with her retirement and the poverty of her home because they left her freer to lift up her heart to God and to cling to Him closely as the supreme Goodness for which her heart yearned (...).

The more she wonders at the sublime dignity and gives thanks to the power and mercy of God, the more does she, conscious of no merit in herself, grow in humility, promptly proclaiming and consecrating herself the handmaid of God even while she becomes His Mother."

Pope Leo XIII’s Encyclical Letter Magnae Dei Matris, on the Rosary