Heraclitan of Ephesus was an Ancient Greek, pre-Socratic, Ionian philosopher, remembered for his cosmology, in which fire forms the basic material principle of an orderly universe (Britannica.com).
Heraclitan Relativism can be interpreted by everything’s indefinability. Two ways to explain why things are undefinable are the limited perspectives used to interpret the definition of a thing and the constantly changing state of everything in the world.