“If the doors of perception were cleansed, everything would appear to man as it is, infinite. For man has closed himself up, till he sees all things thro’ narrow chinks of his cavern.” – William Blake
What does William Blake refer to with his quote?
The dirty glass door is a metaphor for restricting perception.
Imagine yourself in a short section of a long corridor with a dirty glass door in front of you. You cannot see through it. To perceive something new, you have to open the door, step through the doorway and into the next section of the corridor. In this new section you perceive something new.
But this new piece of corridor is also a short section with a dirty glass door in front. So you must again open the door and step forwards to perceive the new.
And so it goes on. Dirty door after dirty door.
Now imagine those glass doors were dazzlingly clean and crystal clear. You would see right down the corridor. And you would see that possibility of the new goes on for ever.
Now imagine that countless corridors project out from you in countless directions – all with glass doors separating the known from the new. If the doors of perception along all those corridors were cleansed, you’d see infinity in overwhelming clarity.
(I wanted to understand the meaning of this quote and I think this answer nailed it to a T. I looked it up and this is the explanation someone gave and I loved it.) – Goes to say, I didn’t write out this explanation.
Oasis – Wonderwall