Who said "To perceive a thing is already to alter it."?

This quote is attributed to Wallace Stevens.

To perceive a thing is already to alter it. - Wallace Stevens

"To perceive a thing is already to alter it."

Wallace Stevens Philosophy

Poet American 1879–1955

"The only emperor is the emperor of ice-cream."

"One must have a mind of winter to regard the frost and the boughs of the pine trees crusted with snow."

"The imagination is man's power over nature."

"After the final no there comes a yes and on that yes the future world is built."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."