Heraclitus: book of nature

Heraclitus book of nature , temple of Artemis, Ephesus ancient Greece.

Heraclitus was a Greek philosopher from Ephesus , Asia Minor. Ephesus is known for the early connections with christian community and St Paul’s travels.
https://archive.archaeology.org/online/news/stpaul.html
Heraclitus created a  theory for universe and nature, which he expressed in a obscured language. His doctrines are : The unity of opposites in universe, the universal flux and that fire (energy) is the basis of cosmos. The unity of that forces is delivered by logos.
https://plato.stanford.edu/entries/heraclitus
https://www.cambridge.org/core/journals/classical-quarterly/article/heraclitean-flux-and-unity-of-opposites-in-platos-theaetetus-and-cratylus/0DC108C60EB6ADFB11A1AE4B318191FE
http://www.jstor.org/stable/26212409?seq=1#page_scan_tab_contents

Heraclitus wrote a single book called “on nature”, which had been lost. Euripides gave a copy of Heraclitus’ book to Socrates to read; when asked his opinion of the book, Socrates replied, “The part I understand is excellent, and so too is, I dare say, the part I do not understand; but it needs a Delian diver to get to the bottom of it” (Lives, 2. 22; 9.12). https://en.wikiquote.org/wiki/Heraclitus