Perception Uncertainty Quotes

Doubting what you see is a very odd experience. And doubting what you remember is a little less odd than doubting what you see. But it's also a pretty odd experience, because some memories come with a very compelling sense of truth about them, and that happens to be the case even for memories that are not true.

For, after all, how do we know that two and two make four? Or that the force of gravity works? Or that the past is unchangeable? If both the past and the external world exist only in the mind, and if the mind itself is controllable – what then?

one can never be sure whether it's good poetry or bad acid

I'm particularly interested in how you can't rely on your own perception.

We live on two levels ... the realistic level and the fantastic level, and which is the real one, really?

In my utter impotence to test the authenticity of the report of my senses, to know whether the impressions they make on me correspond with outlying objects, what difference does it make, whether Orion is up there in heaven, or some god paints the image in the firmament of the soul?

I'm not completely sure we aren't all living in a hallucination now.

Art depends upon the inexactitude of sight.

I do not believe that I am now dreaming, but I cannot prove that I am not. I am, however, quite certain that I am having certain experiences, whether they be those of a dream or those of waking life.