Who said "The mind once enlightened cannot become dark."?

This quote is attributed to Amy Lowell.

The mind once enlightened cannot become dark. - Amy Lowell

"The mind once enlightened cannot become dark."

Amy Lowell Knowledge

Poet Critic American 1874–1925

"Poetry is the clear expression of mixed feelings."

"All books are either dreams or swords."

"The world breaks everyone, and afterward, many are strong at the broken places."

"Beauty is something wonderful and strange that the artist brings into the world."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."