Who said "The mind is the measure of all things that exist."?

This quote is attributed to Heraclitus.

The mind is the measure of all things that exist. - Heraclitus

"The mind is the measure of all things that exist."

Heraclitus Knowledge

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."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."