Background and terminology Heraclitus 赫拉克里特Heraclitus(540?-480? BC),Greek philosopher,who believed that fire is the primordial source of matter and that the entire world is in a constant state of change.He was born in Ephesus,an ancient Greek city in Asia Minor,in what is now Turkey.Background and terminology Background and terminology Heraclitus Heraclitus 赫拉克里特Heraclitus (540? Heraclitus (540? -480? BC), Greek philosopher, who BC), Greek philosopher, who believed that fire is the primordial believed that fire is the primordial source of matter and that the entire source of matter and that the entire world is in a constant state of world is in a constant state of change. He was born in Ephesus, an change. He was born in Ephesus, an ancient Greek city in Asia Minor, in ancient Greek city in Asia Minor, in what is now Turkey. what is now Turkey