Who said "We are all alone, but not everyone admits it"?

This quote is attributed to Edvard Munch.

We are all alone, but not everyone admits it - Edvard Munch

"We are all alone, but not everyone admits it"

Edvard Munch Solitude

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"

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."