"It is only through shadows that one comes to know the light."-St. Catherine of Siena, from Prayer 24.
I don't know the context of her prayer 24, but I pick it for this literary blog because a writer must write of and through shadows to arrive at true meaning.
I also love this image of her dictating to a secretary. All her secretaries were male, since only men were taught to write, and she had three priests who traveled with her on most of her trips abroad.