Who said "Imagination is the only limit to what we can achieve."?

This quote is attributed to Agatha Harkness.

Imagination is the only limit to what we can achieve. - Agatha Harkness

"Imagination is the only limit to what we can achieve."

Agatha Harkness Imagination

"Well, hello, dearie."

"The real question is, what are you willing to do to keep what you love?"

"Power isn't given, it's taken."

"I'm not a witch. Well, not a traditional one anyway."

"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."