A text is not static. It is akin to a single cumulus cloud: it seems still but is made of countless forces, vectors and modes of interpretation.
Texts can be akin to functionalities seen in biology and chemistry: skin can reform in swarm to repair wound, gasses in alkane series only need a shift in the hierarchical balance of factors to organically form a new entity. Text can be internally interactive and in ways beyond simple shifts , intstead in parts to whole from a sentence to a novel.
Semiotics is also fluid as semioticians will each see the same system differently from parts to whole.
A book long ago published holds hidden chapters. The variables left open hold predictive algorithms and interactions left open.
Text is never static but is seen as such like the words here.