Irish Booker Prize winner 'astonished' by Dublin disturbances

The speaker reflects on the timeless nature of certain energies and the purpose of their book, which is to convey that these energies persist throughout history. They emphasize the need for deeper responses to these ideas and suggest that events in Dublin can be seen as a warning.

What does the author mean by saying that the energy discussed is 'always there under the surface'?

Why does the author emphasize that the occurrences in the book are timeless?