When men dream, each has his own world. When they are awake, they have a common world

When men dream, each has his own world. When they are awake, they have a common world

Heraclitus, the ancient Greek philosopher known for his doctrine of change and the concept of the unity of opposites, believed that the world is in a constant state of flux. He famously stated that “you cannot step into the same river twice” to illustrate the idea that everything is constantly changing and nothing remains the same.