To see is one thing; to picture or visualise is another. A person can see things, only when his eyes are open, and when his surroundings are illuminated; but he can have pictures in his mind's eye, when his eyes are shut and when the world is dark.
Gilbert RyleSo too Plato was, in my view, a very unreliable Platonist. He was too much of a philosopher to think that anything he had said was the last word.
Gilbert Ryle