Who said "An artist must be ruthless in pursuit of his art."?

This quote is attributed to Ralph Ellison.

An artist must be ruthless in pursuit of his art. - Ralph Ellison

"An artist must be ruthless in pursuit of his art."

Ralph Ellison

Novelist American 1914–1994

"I am invisible, not because of any biochemical accident, but because of the peculiar disposition of the eyes of those with whom I come in contact."

"Without individuals we have no life."

"All sickness is not unto death, neither is imprisonment."

"America is woven of many strands; I would recognize them and let it so remain."