I am afraid. Not of life, or death, or nothingness, but of wasting it as if I had never been. And as I start through the opening, I feel the pressure around me, propelling me in violent wavelike motions toward the mouth of the cave.

In Flowers for Algernon, Charlie Gordon becomes aware of his own impending cognitive decline and has a transcendent hallucination on his therapist’s couch.

The imagery leans into Plato’s allegory of the cave which is also present as a quote in the beginning of the book:

Any one who has common sense will remember that the bewilderments of the eyes are of two kinds, and arise from two causes, either from coming out of the light or from going into the light, which is true of the mind's eye, quite as much as of the bodily eye; and he who remembers this when he sees any one whose vision is perplexed and weak, will not be too ready to laugh; he will first ask whether that soul of man has come out of the brighter life, and is unable to see because unaccustomed to the dark, or having turned from dakness to the day is dazzled by excess of light. And he will count the one happy in his condition and state of being, and he will pity the other; or, if he have a mind to laugh at the soul which comes from below into the light, there will be more reason in this than in the laugh which greets him who returns from above out of the light into the den.

Full passage

Upward, moving, like a leaf in an upcurrent of warm air. Speeding, the atoms of my body hurtling away from each other. I grow lighter, less dense, and larger... larger... exploding outward into the sun. I am an expanding universe swimming upward in a silent sea. Small at first, encompassing with my body, the room, the building, the city, the country, until I know that if I look down I will see my shadow blotting out the earth.

Light and unfeeling. Drifting and expanding through time and space.

And then, as I know I am about to pierce the crust of existence, like a flying fish leaping out of the sea, I feel the pull from below.

It annoys me. I want to shake it off. On the verge of blending with the universe I hear the whispers around the ridges of consciousness. And that ever-so-slight tug holds me to the finite and the mortal world below.

Slowly, as waves recede, my expanding spirit shrinks back into earthly dimensions—not voluntarily, because I would prefer to lose myself, but I am pulled from below, back to myself, into myself, so that for just one moment I am on the couch again, fitting the fingers of my awareness into the glove of my flesh. And I know I can move this finger or wink that eye—if I want to. But I don't want to move. I will not move!

I wait, and leave myself open, passive, to whatever this experience means. Charlie doesn't want me to pierece the upper curtain of the mind. Charlie doesn't want to know what lies beyond.

Does he fear seeing God?

Or seeing nothing?

As I lie here waiting, the moment passes during which I am myself in myself, and again I lose all feeling of body or sensation. Charlie is drawing me down into myself. I stare inward in the center of my unseeing eye at the red spot that transforms itself into a multipetaled flower—the shimmering, swirling, luminescent flower that lies deep in the core of my unconscious.

I am shrinking. Not in the sense of the atoms of my body becoming closer and more dense, but a fusion—as the atoms of my-self merge into microcosm. There will be great heat and unbearable light—the hell within hell—but I don't look at the light, only at the flower, unmultiplying, undividing itself back from the many toward one. And for an instant the shimmering flower turns into the golden disk twirling on a string, and then to the bubble of swirling rainbows, and finally I am back in the cave where everything is quiet and dark and I swim the wet labyrinth searching for one to receive me... embrace me... absorb me... into itself.

That I may begin.

In the core I see the light again, an opening in the darkest of caves, now tiny and far away—through the wrong end of a telescope—brilliant, blinding, shimmering, and once again the multipetaled flower (swirling lotus—that floats near the entrance of the unconscious). At the entrance of that cave I will find the answer, if I dare go back and plunge through it into the grotto of light beyond.

Not yet!

I am afraid. Not of life, or death, or nothingness, but of wasting it as if I had never been. And as I start through the opening, I feel the pressure around me, propelling me in violent wavelike motions toward the mouth of the cave.

It's too small! I can't get through!

And suddenly I am hurled against the walls, again and again, and forced through the opening where the light threatens to burst my eyes. Again, I know I will pierce the crust into that holy light. More than I can bear. Pain as I have never known, and coldness, and nausea, and the great buzzing over my head flapping like a thousand wings. I open my eyes, blinded by the intense light. And flail the air and tremble and scream.