Who said "Those who hear me must also understand that all is one."?

This quote is attributed to Heraclitus.

Those who hear me must also understand that all is one. - Heraclitus

"Those who hear me must also understand that all is one."

Heraclitus Philosophy

Philosopher Ancient Greek 540–480

"Change is the only constant in life."

"No one steps in the same river twice."

"The path up and down are one and the same."

"Conflict is the father of all things."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."