Who said "My greatest fear is irrelevance, not death."?

This quote is attributed to Edvard Munch.

My greatest fear is irrelevance, not death. - Edvard Munch

"My greatest fear is irrelevance, not death."

Edvard Munch Fear

Expressionist Painter Norwegian 1863–1944

"Nature itself is not fixed, but flows"

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

"A scream pierces through nature"

"Life begins where fear ends"

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."