Dr Paul Murray OP 
God“s Spies: Michelangelo, Shakespeare and Other Poets of Vision [PDF ebook] 

Written with both passion and precision,
God“s Spies is a work that will be welcomed by anyone interested in the vital interplay between poetry and religion. The authors represented, including poets such as Michelangelo, St Francis of Assisi, Charles Péguy, Dante and Shakespeare, all possess one great and surprising quality in common: audacity. All of them in their work offer fresh and unforeseen perspectives on life and literature.
Some of these authors are religious in the strict meaning of the word, their work indicating a devout turning away from the distractions of the world to focus on God. Others, in contrast, are poets whose work is distinguished by a remarkable visionary focus on the many small and great dramas of life, attending with bright, imaginative genius to what Shakespeare calls “the mystery of things“.