Today is the feast of St. Francis de Sales, Doctor of the Church. From An Introduction to the Devout Life (Part I, Chapter 2):
Ponder Jacob’s ladder:—it is a true picture of the devout life; the two poles which support the steps are types of prayer which seeks the love of God, and the Sacraments which confer that love; while the steps themselves are simply the degrees of love by which we go on from virtue to virtue, either descending by good deeds on behalf of our neighbour or ascending by contemplation to a loving union with God. Consider, too, who they are who trod this ladder; men with angels’ hearts, or angels with human forms. They are not youthful, but they seem to be so by reason of their vigour and spiritual activity. They have wings wherewith to fly, and attain to God in holy prayer, but they have likewise feet wherewith to tread in human paths by a holy gracious intercourse with men; their faces are bright and beautiful, inasmuch as they accept all things gently and sweetly; their heads and limbs are uncovered, because their thoughts, affections and actions have no motive or object save that of pleasing God; the rest of their bodies is covered with a light shining garment, because while they use the world and the things of this life, they use all such purely and honestly, and no further than is needful for their condition—such are the truly devout.