Nothing is lost or destroyed but raised up and preserved as in a spiral. For anything to happen, everything has to be in place.
"But in writing that book I became aware of employing a new and unprecedented way of thinking".
Dialectical thinking derives its dynamic of negation from its ability to reveal "contradictions" within almost any category or identity.
Hegel's "contradiction" does not simply mean a mechanical denial or opposition.
Hegel's different way of thinking has become known as dialectical thinking.
What makes dialectical thinking so difficult to explain is that it can only be seen in practice.