William Blake, the great poet, artist, engraver, wrote a particular line in his long poem, "The Marriage of Heaven and Hell." Blake, in the poem, has himself talking to the prophets Ezekiel and Isaiah, asking them how they know they were really talking to God when they heard these voices or had visions. Blake himself had been having visions since he was a kid, so the subject was one close to his heart. Isaiah and Ezekiel both go on about perceiving the infinite, and that it's somehow its own validation that the visions come from God. They both talk about the Poetic Genius being the most important thing, Poetic Genius not as a person, but as a principle that needs to be understood and nurtured. Then comes the famous line - "If the doors of perception were cleansed, everything would appear to man as it is, infinite."
Now, this line has always bothered me. Having a clean door never seemed to me to do much in terms of perception. It's a door. If the line was, "If the windows of the doors of perception were cleansed..." that would make sense. Or better still, just a clean window. The metaphor of a window clouded by the dirt and grime of illusion, preventing a person from seeing clearly what is actually outside - now that's a good metaphor. But the 'doors of perception'?
Clearly, Blake needed an editor.
The line that follows tries to justify the door bit by stating - "For man has closed himself up, till he sees all things through narrow chinks of his cavern." Caverns don't have doors, and besides, it's a mixed metaphor. Weak as poetry. Blake might have been seeing some kind of vision in his mind when he wrote it, but like some of the lyrics Bob Dylan wrote in the mid-sixties, whatever he was thinking at the time didn't exactly translate to the page.
So I might humbly suggest the better phrase would have been, "If the windows of perception were cleansed, everything would appear to man as it is, infinite." Much improved, and to boot it references the apostle Paul's "For we know in part, and we prophesy in part. But when that which is perfect is come, then that which is in part shall be done away.... For now we see through a glass, darkly." In other words, when Jesus comes back, (according to Paul - and the Rapture people... still waiting on that) all will be made clear.
So, when the dirty windows of perception are washed, you'll be able to see the outside as it is, all the way to the horizon and up into the great night sky. There's your metaphor.
Ahh, but here's the rub. In that case, The Doors - the band, that is - would have been known as The Windows.
Just not the same.
There's a strange thing that happens in this world, when things seem both interconnected and destined. How or why or if that's true, I couldn't really say, but it might be something to think about when you're taking some time to explore that Poetic Genius thing, during those moments when life has somehow slowed down enough to give you time to do so. When you elect to turn off your smartphone, for instance.