Quote by Heraclitus: “All things are in motion like a river.”

This quote captures the essence of Heraclitus's philosophy: that the universe is in a state of constant flux. It metaphorically compares all existence to a flowing river, emphasizing that nothing ever truly remains static or unchanging, urging us to embrace motion.

Heraclitus, active around 500 BCE, proposed a radical view of a universe defined by change and opposition. His ideas challenged prevailing notions of permanence, profoundly influencing subsequent Greek philosophy and providing an early framework for understanding dynamic systems.

Greek philosopher from Ephesus, active around 500 BCE, known for his doctrine that change is the fundamental nature of the universe. His surviving work exists only in fragments quoted by later writers. He was called 'the Obscure' by ancient commentators for his cryptic, aphoristic style.