
"More than all the angels and all the saints has God ineffable freely endowed Mary with the fullness of the heavenly gifts that abound in the divine treasury; and she, preserving herself ever immaculately clean from the slightest taint of sin, attained a fullness of innocence and holiness so great as to be unthinkable apart from God Himself, a fullness that no one other than God will ever possess."
Pope Pius IX in Ineffabilis Deus