Who said "The mind is the only prison that cannot be escaped."?

This quote is attributed to The Ancient One.

The mind is the only prison that cannot be escaped. - The Ancient One

"The mind is the only prison that cannot be escaped."

The Ancient One Freedom

"The universe is not only queerer than we suppose, but queerer than we can suppose."

"Time is the most precious resource in existence. Use it wisely."

"Fear is the mind-killer. It clouds judgment and prevents growth."

"Power is not measured by what you can destroy, but by what you can create."

"Freedom to pursue your passion is precious."

"Freedom comes at a cost."

"Order isn't restriction. It's freedom."

"Freedom comes with responsibility"