direct address, metaphor reinforces how important certain texts are to our identity and who we are even though they are disposable.
'sun shines through their borderlines'
Metaphor, the sun is a powerful, permanent force, whereas borders are just temporary marks on paper
'living tissue, raise a structure/never meant to last'
Explains how segregation was a social structure never meant to last and all discrimination will eventually fail as it is meaningless.
'architect'
they design building possibly referring to how it doesn't matter how life or everything around you is build it matters how the architect (you) want it to be build.
'paper thinned by age or touching'
Metaphor - shows how important and used these texts are and thus their importance.