Who said "To think and to be are one and the same thing."?

This quote is attributed to Parmenides.

To think and to be are one and the same thing. - Parmenides

"To think and to be are one and the same thing."

Parmenides Knowledge

Philosopher Ancient Greece 515–445

"What is, is. What is not, is not."

"Being is; not-being is not."

"One should both say and think that Being is."

"How could what is perish? How could it come to be?"

"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."