"God's universal providence"

“GOD’S universal providence works through secondary causes. . . . The world of pure spirits stretches between the Divine Nature and the world of human beings; because Divine Wisdom has ordained that the higher should look after the lower, angels execute the divine plan for human salvation: they are our guardians, who free us when hindered and help to bring us home.”

~St. Thomas Aquinas: Commentary on the Sentences, 2, 11, 1, 1.

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"The Mystical Nativity" by Sandro Botticelli.
Tempera on canvas, c. 1500; National Gallery, London.