Who said "The human imagination has come to an impasse."?

This quote is attributed to John Keats.

The human imagination has come to an impasse. - John Keats

"The human imagination has come to an impasse."

John Keats Imagination

Poet English 1795–1821

"A thing of beauty is a joy forever"

"The poetry of the earth is never dead"

"I am certain of nothing but the holiness of the heart's affections"

"Negative capability is when a man is capable of being in uncertainties without irritably reaching for fact"

"Imagination is more powerful than knowledge."

"The world is full of wonders if you know where to look."

"You have the imagination of a child, Lucy"

"The world is full of mysteries waiting to be solved."