Halfway in a dream

I managed to track down the Wigner quote I mentioned in an earlier post.

... Perhaps the consciousness of animals is more shadowy than ours and perhaps their perceptions are always dreamlike. On the opposite side, whenever I talked with the sharpest intellect I have ever known -- with von Neumann -- I always had the impression that only he was fully awake, that I was halfway in a dream.

It can be found on page 46 of Philosophical reflections and syntheses by Wigner et al.