Who abideth in charity, abideth in God, and God in him. -1 Jn 4:16
The object of all virtues is to bring us into union with God, in which alone is laid up all the happiness that can be enjoyed in this world. Now, in what does this union properly consist? In nothing save a perfect conformity and resemblance between our will and the will of God, so that these two wills are absolutely alike — there is nothing in one repugnant to the other; all that one wishes and loves, the other wishes and loves; whatever pleases or displeases one, pleases or displeases the other. -St. John of the Cross
The Blessed Virgin possessed this perfect union, and St. Bernard says of her that she kept her eyes on the watch, and her consent fully prepared for every token of the Divine will.
The Venerable Mother Seraphina di Dio had advanced far on this road, for, in an account which she gave of herself to her director, she was able to say: “My soul seems to be so much in harmony with our Lord, that whatever He operates in it, always appears most fitting, for it is the very thing which it wills for itself. Whatever comes to my soul, is a sweet morsel made on purpose for it, and it seems unable to desire anything else, so that it never experiences bitterness or trouble.”
Once, when she accused herself of want of conformity to the Divine will, she received at that moment a ray of light by which she saw how beautiful is the will of God so clearly that she remained for some time overcome with astonishment that a creature, sprung from nothing, should fail to love the most holy and beautiful will of its Creator.
Text from A Year With the Saints (New York: P.J. Kenedy & Sons, 1891).