'I always imagined we have concentric circles of compassion and it starts with Blood - that oh so wonderful affection which near relations are supposed to conceive for one another.
Concentric circles, ripples of empathy, moving out from the centre.
There's me in the middle with my self-interest. Then there's your family. Then your friends and lovers maybe, then colleagues and acquaintances, then strangers and passersby, out and out and out and out and out until the circle of people you've never met or will never meet.
People who were in a different time and space to you. And people move between our circles, in he ripples, out and in, slow and fluid.
But you now, you're in another category all together.
If the dead still exist in our hearts, what if our hearts are wrong?' Harriet Walter is one of our most admired and acclaimed actors, and holds an Olivier and Evening Standard award for her work, including the Donmar Warehouse production of Mary Stuart.
Here she performs alongside her husband, Guy Paul, whose recent film work includes The Fifth Estate and Hyde Park on the Hudson.