The quotation here is from Gregory the Great’s Moralia on Job, section 4. The text may be found in context here.
Thanks to Andy Naselli, blogger and PhD student at Trinity Evangelical Divinity School, for tracking down the quotation (which I remembered was from somewhere in Gregory’s works) and adding the following spectacular image:
Image by Olivier Blaise, flickr.com/photos/olivierblaise/sets/
We share with all the saints one Lord
Francis of Assisi--part of an altarpiece by Bartolomeo Vivarini, in the Brooklyn Museum
From a mid-15th-century Dutch prayerbook: Saint James the Great; Saint Joseph; Saint Ghislain, abbot of St Ghislain, near Mons; Saint Eligius; Saint Ermes (Hermes)
Gregory the Great and St. Mamertinus, from a 14th-century French translation of Jacobus de Voragine, Legenda aurea
Cologne Cathedral
The clocktower of the Saint-Leu-Saint-Gilles church in Saint-Leu-la-Forêt (Val-d'Oise), France
Masaccio, Crucifixion, 1426 (Naples, Museo Nazionale di Capodimonte); the blonde figure is Mary Magdalen
Door of Tewkesbury Abbey cloister
Medieval Wisdom for Modern Christians
Grateful to the dead 
Hello,
I am the author of the swimming elephant photo reproduced on this blog.
Please consider adding my name with a link to my website as credit for
my image. Thank to let me know when this will be done.
Best regards,
Olivier Blaise
Hello,
I am the author of this image, I would appreciate if you could ad my name
and the link to my photos galleries on flickr. Thank you very much.
Olivier Blaise