Who said "I am the eternal subject, the eternal object."?

This quote is attributed to Frida Kahlo.

I am the eternal subject, the eternal object. - Frida Kahlo

"I am the eternal subject, the eternal object."

Frida Kahlo

Surrealist Painter Mexican 1907–1954

"Feet, what do I need you for when I have wings to fly?"

"I paint myself because I am so often alone and because I am the subject I know best."

"I am my own muse, I am the subject I know best. The subject I want to know better."

"Courage is the base everything moral is built upon."