If the doors of perception were cleansed everything would appear to man as it is, infinite.
— William Blake
Astounding Doors Of Perception quotations
Preconceived notions are the locks on the door to wisdom.

It is one of the commonest of our mistakes to consider that the limit of our power of perception is also the limit of all that there is to perceive.

We live together, we act on, and react to one another;
but always, and in all circumstances, we are by ourselves.
Every individual is at once the beneficiary and the victim of the linguistic tradition into which he has been born.
When the doors of perception are cleansed, men will see things as they truly are, infinite.

What do you mean, blindly? That baby is a very sentient creature… That baby sees the world with a completeness that you and I will never know again. His doors of perception have not yet been closed. He still experiences the moment he lives in.
Man has closed himself up, till he sees all things thro' narrow chinks of his cavern.
We live together, we act on, and react to, one another;
but always and in all circumstances we are by ourselves. [...] By its very nature every embodied spirit is doomed to suffer and enjoy in solitude. Sensations, feelings, insights, fancies - all these are private and, except through symbols and at second hand, incommunicable.

The really explicit phrase is doors of perception.
Hallucinogens are a value changer...like it or not, it changes your values, it opens up windows (doors of perception.)
There are things of such darkness and horror—just, I suppose, as there are things of such great beauty—that they will not fit through the puny human doors of perception.

The editor needs to put his own life on hold for the better of the magazine, the crew, and the readers. And to have a bigger vision of the magazine's style and an understanding that every [issue] should be well-balanced and hopefully surprising. To have a pink wall with a door of perception where he can bang his head on.
Aldous Huxley took the drug mescaline and then chronicled his experience in the book The Doors of Perception. Now, I don't actually think that's the first thing he wrote: he probably wrote 'my brain is melting' ten thousand times, but it was the book that the critics latched on to.
Each person is at each moment capable of remembering all that has ever happened to him and of perceiving everything that is happening everywhere in the universe.

Fiction—and poetry and drama— cleanse the doors of perception.
Education, we see, is not merely gaining knowledge or skills helpful toward productive work, though certainly that is a part of it. Rather it is a replenishment and an expansion of the natural thirst of the mind and soul. Learning is a gradual process of growth, each step building upon the other. It is a process whereby the learner organizes and integrates not only facts but attitudes and values. The Lord has told us that we must open our minds and our hearts to learn. There is a Chinese proverb: Wisdom is as the moon rises, perceptible not in progress but in result. As our knowledge is converted to wisdom, the door to opportunity is unlocked.
Take a sound from whatever source, a note on a violin, a scream, a moan, a creaking door, and there is always this symmetry between the sound basis, which is complex and has numerous characteristics which emerge through a process of comparison within our perception.

But when the door shuts on us, all that vanishes.
The shell-like covering which our souls have excreted to house themselves, to make for themselves a shape distinct from others, is broken, and there is left of all these wrinkles and roughnesses a central oyster of perceptiveness, an enormous eye. How beautiful a street is in winter!
If the doors of perception were cleansed every thing 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.
If the doors of perception were cleansed every thing 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.

There are things known and there are things unknown, and in between are the doors of perception.
Space Jam was weird because everybody has their own perception of what Bugs Bunny should sound like. Everybody. Somebody would just stick their head in the door and say, "He sounds too Jewish." Or, "He's too tough, he's off-putting. You gotta seduce kids, not scare them out the door."
Integrity is what you do behind closed doors or when you think nobody is watching. Integrity is the true essence of who you are, your beliefs and your values. Reputation is the public perception of who you are. It is how others view your integrity or strong moral principles.

People "died" all the time. . . . Parts of them died when they made the wrong kinds of decisions-decisions against life. Sometimes they died bit by bit until finally they were just living corpses walking around. If you were perceptive you could see it in their eyes; the fire had gone out. . . you always knew when you made a decision against life. The door clicked and you were safe inside-safe and dead.
The faster it ran away from me. And I found myself reasoning that perhaps one more beer would unlock the doors of perception.