i see it so simply that walls are supposed to be hard material , hearts ( or other intestines ) soft , in both pictures its other way around - and here it looks like living or at least organic , there ( in heart of steel ) dead , or unorganic material .
and in the world of metaphors paradoxes are not paradoxes , things are more true than meets the eye - particles of human are the hollow citadel around which reality is build , heart of steel like a frame ( even if itīs the core of being ) , the walls shown outside soft and malleable and prone to the changes brought by the circumstances i hope this makes any sense .
Oh wow-I am TOTALLY loving these walls, and you ought to post more of these!!
These walls are just provoking so many thoughts in the head!
My interpretation: Blue is for the ocean, and red is for blood. Now we will consider ocean as the blood of the earth (blue), and red is human blood-and somehow, without making any actual effort, the colour of human blood dominates over the colour of earth's blood. And because, the wall has been peeled off, it makes me think that this whole which-colour-dominates-over-which is a secret. But it's not really that hidden, because all a person ever needed to do was peel the wall.