I found the above phrase in the book "The story of my life" by Helen Keller. The actual sentence is below.
It has been my privilege to meet a few great actors and actress who have the power of so bewitching you that you forget time and place and live again in the romantic past. I have been permitted to touch the face and costume of Miss Ellen Terry as she impersonated our ideal of a queen; and there was about her that divinity that hedges sublimest woe
I am having a hard time grasping the meaning of "divinity that hedges sublimest woe". What is the exact meaning of it for the given context?